Active NPI 1457301442 Individual Practitioner Male Practitioner

Dr. Benjamin L Mason , MD

Ophthalmology • Waterloo, IA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Benjamin Mason, MD is a certified Ophthalmology practicing in Waterloo, IA. With approximately 25 years of clinical experience since graduating from University Of Iowa, Rj & L Carver College Of Medicine in 2001, Dr. Mason delivers high-quality medical care to the local community at 999 HOME PLZ.

Dr. Mason is affiliated with Wolfe Clinic Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include measurement of corneal curvature and depth of eye, removal of cataract with insertion of lens, established patient complete exam of visual system. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

999 Home Plz

Waterloo, IA 507014822

Telephone 3192875890

Fax 3192875079

Associated Practice Facility / Clinic

🏢 Iowa Eyecare Associates Pc Facility NPI 1619937133

Medicare Profile & Education

Medical School

University Of Iowa, Rj & L Carver College Of Medicine

Graduation Year

2001

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Ophthalmology in Waterloo, IA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

25 Yrs -3.0 yrs vs City Avg

City Avg: 28.0 Yrs

State Avg: 27.5 Yrs

Regional Practice Density

5 Specialists

Practicing in Waterloo, IA (233 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

73.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mason (25 Years) 25 Yrs

Waterloo Specialty Average (28.0 Years) 28.0 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92136 Measurement of corneal curvature and depth of eye	1,204	423	$96.60	$23.52
66984 Removal of cataract with insertion of lens	1,104	359	$1193.04	$218.69
92014 Established patient complete exam of visual system	800	795	$303.00	$115.68
92133 Imaging of optic nerve	597	577	$110.00	$31.24
92083 Exam of visual field with extended testing	502	496	$177.00	$57.60
92004 New patient complete exam of visual system	467	467	$361.00	$137.58
92012 Established patient problem focused exam of visual system	375	290	$211.00	$81.69
66982 Complex removal of cataract with insertion of prosthetic lens	230	84	$1337.41	$310.09
92134 Imaging of retina	223	217	$111.00	$35.41
66821 Removal of recurring cataract in lens capsule using a laser	191	189	$1053.86	$331.09
92020 Examination of cornea and iris using lens device and slit lamp	129	118	$70.00	$25.35
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	112	111	$201.00	$118.44
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	107	96	$38.00	$21.28
76514 Ultrasound scan of cornea to determine thickness	67	67	$130.97	$9.63
65855 Laser repair to improve eye fluid flow	62	48	$1625.84	$228.57
99213 Established patient office or other outpatient visit, typically 15 minutes	56	53	$140.00	$83.80
66991 Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye	34	12	$1295.35	$305.03
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$304.00	$153.91
92025 Ct scan of cornea	11	11	$98.00	$33.30

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
66984 Removal of cataract with insertion of lens	1,226	398	$1209.92	$228.36
92136 Measurement of corneal curvature and depth of eye	1,128	398	$96.51	$23.84
92014 Established patient complete exam of visual system	756	740	$303.00	$117.67
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	636	459	$201.00	$118.29
92133 Imaging of optic nerve	622	594	$110.00	$31.86
92083 Exam of visual field with extended testing	522	513	$177.00	$57.60
92004 New patient complete exam of visual system	255	255	$361.00	$140.06
66982 Complex removal of cataract with insertion of prosthetic lens	191	70	$1296.08	$301.49
76519 Ultrasound of eye for determination of lens power	180	66	$97.07	$30.56
66821 Removal of recurring cataract in lens capsule using a laser	160	157	$1048.16	$322.09
92134 Imaging of retina	140	132	$111.00	$36.16
99213 Established patient office or other outpatient visit, typically 15 minutes	113	92	$140.00	$83.96
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	85	79	$38.00	$21.40
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	84	82	$85.00	$51.88
92020 Examination of cornea and iris using lens device and slit lamp	79	62	$70.00	$25.86
66991 Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye	53	20	$1246.58	$300.60
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	49	49	$304.00	$154.40
65855 Laser repair to improve eye fluid flow	44	33	$1592.91	$228.40
76514 Ultrasound scan of cornea to determine thickness	21	21	$130.00	$9.83
99202 New patient office or other outpatient visit, typically 20 minutes	17	17	$139.00	$67.14
92012 Established patient problem focused exam of visual system	12	12	$211.00	$83.27

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
66984 Removal of cataract with insertion of lens	1,131	378	$1189.66	$231.23
92136 Measurement of corneal curvature and depth of eye	992	351	$96.49	$24.81
92014 Established patient complete exam of visual system	756	741	$303.00	$118.40
92133 Imaging of optic nerve	633	606	$109.86	$32.31
92083 Exam of visual field with extended testing	545	537	$176.81	$58.14
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	346	300	$201.00	$120.48
99213 Established patient office or other outpatient visit, typically 15 minutes	327	298	$140.00	$85.19
76519 Ultrasound of eye for determination of lens power	298	110	$97.51	$31.06
92004 New patient complete exam of visual system	279	279	$361.00	$141.07
66982 Complex removal of cataract with insertion of prosthetic lens	205	78	$1287.62	$314.86
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	185	174	$85.00	$52.00
66821 Removal of recurring cataract in lens capsule using a laser	137	136	$1028.36	$316.03
92134 Imaging of retina	128	121	$110.91	$36.07
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	93	85	$38.00	$21.57
92020 Examination of cornea and iris using lens device and slit lamp	87	73	$70.00	$26.50
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	75	75	$304.00	$156.89
66991 Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye	44	16	$1201.36	$284.03
65855 Laser repair to improve eye fluid flow	29	22	$1575.00	$228.57
92012 Established patient problem focused exam of visual system	24	24	$211.00	$84.53
76514 Ultrasound scan of cornea to determine thickness	22	22	$130.00	$10.08
99202 New patient office or other outpatient visit, typically 20 minutes	20	20	$139.00	$68.06
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	17	17	$200.00	$104.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
66984 Removal of cataract with insertion of lens	923	314	$809.31	$246.62
92136 Measurement of corneal curvature and depth of eye	864	305	$96.44	$27.07
92014 Established patient complete exam of visual system	677	665	$299.92	$120.71
92133 Imaging of optic nerve	659	633	$109.93	$33.18
92083 Exam of visual field with extended testing	549	545	$175.72	$59.64
76519 Ultrasound of eye for determination of lens power	420	147	$96.51	$31.28
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	394	369	$199.16	$123.43
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	323	323	$304.00	$159.42
99213 Established patient office or other outpatient visit, typically 15 minutes	297	255	$136.75	$86.97
92004 New patient complete exam of visual system	277	277	$358.27	$144.08
92012 Established patient problem focused exam of visual system	275	214	$208.36	$85.43
66984 Removal of cataract with insertion of lens	250	89	$836.48	$252.83
66982 Complex removal of cataract with insertion of prosthetic lens	202	76	$819.68	$313.17
66821 Removal of recurring cataract in lens capsule using a laser	177	174	$1134.70	$332.75
92020 Examination of cornea and iris using lens device and slit lamp	151	128	$69.32	$26.87
92134 Imaging of retina	136	128	$109.67	$37.84
76514 Ultrasound scan of cornea to determine thickness	95	95	$129.68	$10.37
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	88	82	$38.00	$21.44
65855 Laser repair to improve eye fluid flow	35	28	$1575.00	$235.00
0376T Insertion of eye drainage device	31	17	$2525.00	$316.53
0191T Internal insertion of eye fluid drainage device	31	17	$2793.00	$633.07
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	18	11	$760.00	$286.14
92002 New patient problem focused exam of visual system	16	16	$253.06	$82.26
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	16	16	$200.00	$106.59

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
66984 Removal of cataract with insertion of lens	763	260	$782.98	$244.97
92136 Measurement of corneal curvature and depth of eye	652	236	$96.38	$30.02
92133 Imaging of optic nerve	586	574	$110.00	$33.48
92083 Exam of visual field with extended testing	496	492	$175.00	$59.94
92014 Established patient complete exam of visual system	469	463	$297.00	$120.56
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	452	444	$198.00	$103.94
76519 Ultrasound of eye for determination of lens power	341	122	$96.69	$31.58
99213 Established patient office or other outpatient visit, typically 15 minutes	340	263	$135.00	$71.59
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	327	327	$304.00	$156.09
92004 New patient complete exam of visual system	187	187	$356.00	$145.16
66982 Complex removal of cataract with insertion of prosthetic lens	181	68	$893.48	$328.04
92012 Established patient problem focused exam of visual system	167	142	$206.00	$84.87
66984 Removal of cataract with insertion of lens	158	57	$824.08	$253.24
92020 Examination of cornea and iris using lens device and slit lamp	146	138	$69.00	$26.85
66821 Removal of recurring cataract in lens capsule using a laser	142	141	$1157.32	$335.54
92134 Imaging of retina	142	135	$110.00	$37.93
76514 Ultrasound scan of cornea to determine thickness	93	93	$130.00	$10.75
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	56	52	$38.00	$21.95
0191T Internal insertion of eye fluid drainage device	34	21	$2793.00	$610.54
0376T Insertion of eye drainage device	34	21	$2525.00	$305.26
66982 Complex removal of cataract with insertion of prosthetic lens	27	15	$1016.44	$350.96
36415 Insertion of needle into vein for collection of blood sample	23	17	$10.00	$2.99
65855 Laser repair to improve eye fluid flow	19	16	$1575.00	$237.43
66183 Insertion of eye fluid drainage device	12	11	$2793.00	$989.78
92002 New patient problem focused exam of visual system	12	12	$250.00	$80.95

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
66984 Removal of cataract with insertion of lens	1,002	335	$776.64	$281.45
92136 Measurement of corneal curvature and depth of eye	915	326	$96.43	$32.35
92133 Imaging of optic nerve	593	586	$109.92	$32.88
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	573	551	$198.00	$102.96
92014 Established patient complete exam of visual system	533	531	$297.11	$119.40
92083 Exam of visual field with extended testing	522	513	$175.00	$59.88
76519 Ultrasound of eye for determination of lens power	471	171	$96.55	$31.05
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	379	379	$304.00	$155.22
99213 Established patient office or other outpatient visit, typically 15 minutes	349	287	$135.00	$70.20
66982 Complex removal of cataract with insertion of prosthetic lens	238	90	$907.65	$354.95
66984 Removal of cataract with insertion of lens	228	83	$854.77	$300.63
92134 Imaging of retina	191	182	$110.00	$37.92
66821 Removal of recurring cataract in lens capsule using a laser	179	177	$1094.41	$321.35
92004 New patient complete exam of visual system	177	177	$356.00	$142.71
92012 Established patient problem focused exam of visual system	154	131	$206.00	$83.61
92020 Examination of cornea and iris using lens device and slit lamp	116	108	$69.00	$26.50
76514 Ultrasound scan of cornea to determine thickness	74	74	$130.00	$11.17
66982 Complex removal of cataract with insertion of prosthetic lens	66	27	$959.27	$362.75
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	59	55	$38.00	$21.31
65855 Laser repair to improve eye fluid flow	44	36	$1575.00	$234.84
0376T Insertion of eye drainage device	20	12	$2525.00	$301.95
0191T Internal insertion of eye fluid drainage device	20	12	$2793.00	$603.92
36415 Insertion of needle into vein for collection of blood sample	17	12	$10.00	$2.94
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$200.00	$101.78

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
66984 Removal of cataract with insertion of lens	965	323	$784.13	$281.32
92136 Measurement of corneal curvature and depth of eye	932	324	$97.50	$34.66
92133 Imaging of optic nerve	616	606	$110.00	$33.15
92014 Established patient complete exam of visual system	612	609	$297.00	$118.64
92083 Exam of visual field with extended testing	551	538	$175.00	$59.59
99213 Established patient office or other outpatient visit, typically 15 minutes	485	385	$135.00	$68.11
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	366	352	$198.00	$100.75
76519 Ultrasound of eye for determination of lens power	334	116	$96.53	$33.28
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	297	297	$304.00	$153.93
66984 Removal of cataract with insertion of lens	245	90	$1006.49	$335.36
92012 Established patient problem focused exam of visual system	231	196	$206.00	$81.77
92004 New patient complete exam of visual system	224	224	$356.00	$141.51
92134 Imaging of retina	207	189	$110.00	$37.96
66982 Complex removal of cataract with insertion of prosthetic lens	205	74	$821.37	$334.22
66821 Removal of recurring cataract in lens capsule using a laser	149	149	$1075.57	$309.30
92020 Examination of cornea and iris using lens device and slit lamp	124	112	$69.00	$25.50
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	71	69	$38.00	$20.08
76514 Ultrasound scan of cornea to determine thickness	68	68	$130.00	$13.49
66982 Complex removal of cataract with insertion of prosthetic lens	43	19	$1689.21	$562.12
65855 Laser repair to improve eye fluid flow	36	28	$1575.00	$231.18
92002 New patient problem focused exam of visual system	19	19	$250.00	$78.54
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	18	11	$760.00	$278.57
92082 Exam of visual field with intermediate testing	12	11	$130.00	$45.16
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	11	11	$80.00	$40.74

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92136 Measurement of corneal curvature and depth of eye	963	347	$96.39	$38.08
66984 Removal of cataract with insertion of lens	881	305	$794.96	$280.75
92014 Established patient complete exam of visual system	704	701	$250.00	$115.15
92133 Imaging of optic nerve	640	629	$109.93	$32.71
92083 Exam of visual field with extended testing	589	580	$175.00	$59.22
99213 Established patient office or other outpatient visit, typically 15 minutes	522	430	$120.00	$67.65
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	336	322	$175.00	$100.13
92012 Established patient problem focused exam of visual system	300	235	$175.00	$79.54
92004 New patient complete exam of visual system	287	287	$300.00	$139.26
76519 Ultrasound of eye for determination of lens power	267	94	$96.48	$36.25
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	252	252	$250.00	$151.84
66982 Complex removal of cataract with insertion of prosthetic lens	199	81	$922.33	$353.68
92134 Imaging of retina	172	162	$110.00	$37.02
66984 Removal of cataract with insertion of lens	172	72	$1091.73	$349.06
66821 Removal of recurring cataract in lens capsule using a laser	159	159	$1033.02	$310.63
92020 Examination of cornea and iris using lens device and slit lamp	146	134	$55.00	$25.35
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	77	75	$40.00	$18.71
76514 Ultrasound scan of cornea to determine thickness	75	75	$130.00	$13.18
66982 Complex removal of cataract with insertion of prosthetic lens	29	15	$1263.45	$429.14
65855 Laser repair to improve eye fluid flow	28	25	$1575.00	$221.18
92002 New patient problem focused exam of visual system	16	16	$200.00	$75.54
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	16	16	$160.00	$100.06

Medical Specialties & State Licenses

Ophthalmology Primary Specialty

NUCC Taxonomy Code: 207W00000X

State License IA 36579

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

Ophthalmology - Glaucoma Specialist

NUCC Taxonomy Code: 207WX0009X

State License IA 36579

An ophthalmologist who specializes in the treatment of glaucoma and other disorders related to increased intraocular pressure and optic nerve damage. This specialty involves the medical and surgical treatment of these conditions.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

3497792 (IA)

Commercial Insurance / Payer ID Railroad Medicare

P00397399 (IA)

Hospital & Practice Group Affiliations

Wolfe Clinic Inc

8 E Spring St, New Hampton, IA 506592132

Phone: 6413942326

Wolfe Clinic Inc

112 Jefferson St, West Union, IA 521751022

Phone: 5153868196

Wolfe Clinic Inc

999 Home Plz, Waterloo, IA 507014822

Phone: 3192875890

Wolfe Clinic Inc

309 E Church St, Marshalltown, IA 501582946

Phone: 6417546200

Wolfe Clinic Inc

201 E J Ave, Grundy Center, IA 506382028

Phone: 3198245421

Wolfe Clinic Inc

1195 Boyson Rd, Hiawatha, IA 522332218

Phone: 3193628032

Wolfe Clinic Inc

213 N Elm St, Cresco, IA 521361521

Phone: 8005427956

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

1 Associated Practitioners

Dr. Peter Rhee , MD

Ophthalmology

NPI 1730280421

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

7 Historical Events

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 15, 2018

Ophthalmology (License #36579 in IA)

✅

NPI Profile Active May 12, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location May 12, 2015

Registered at 999 HOME PLZ, WATERLOO, IA 507014822 (Tel: 3192875890)

📍

Updated Business Mailing Address May 12, 2015

Registered at 309 E CHURCH ST, MARSHALLTOWN, IA 501582946 (Tel: 6417546200)

👤

Provider Name / Credentials Updated May 12, 2015

Recorded as BENJAMIN MASON, M.D..

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 12, 2015

Ophthalmology (License #36579 in IA)

🟢

Initial NPI Registration & Enumeration May 11, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

No patient reviews submitted yet for Dr. Benjamin Mason. Be the first to share your experience!

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1457301442

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: May 11, 2006

Last Update: February 15, 2018

Sole Proprietor: No

Update or Correct Profile

Mailing Address

309 E Church St

Marshalltown, IA 501582946

Phone: 6417546200

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.