Active NPI 1104852292 Individual Practitioner Male Practitioner

Dr. Nathan C Hamaker , MD

Ophthalmology • Lancaster, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Nathan Hamaker, MD is a certified Ophthalmology practicing in Lancaster, CA. With approximately 23 years of clinical experience since graduating from University Of Texas Medical School At Houston in 2003, Dr. Hamaker delivers high-quality medical care to the local community at 44439 17TH ST W # 210.

Dr. Hamaker is affiliated with Seibert Mobile Optometry Llc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient complete exam of visual system, established patient problem focused exam of visual system, imaging of optic nerve. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

44439 17th St W # 210

Lancaster, CA 935342831

Telephone 8168383464

Fax 8186722700

Medicare Profile & Education

Medical School

University Of Texas Medical School At Houston

Graduation Year

2003

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Ophthalmology in Lancaster, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

23 Yrs +1.5 yrs vs City Avg

City Avg: 21.5 Yrs

State Avg: 29.5 Yrs

Regional Practice Density

7 Specialists

Practicing in Lancaster, CA (3116 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

47.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Hamaker (23 Years) 23 Yrs

Lancaster Specialty Average (21.5 Years) 21.5 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
92014 Established patient complete exam of visual system	555	535	$198.07	$123.58
92012 Established patient problem focused exam of visual system	172	144	$150.91	$87.23
92133 Imaging of optic nerve	150	150	$63.73	$35.64
92004 New patient complete exam of visual system	130	130	$172.35	$147.70
92083 Exam of visual field with extended testing	99	98	$107.27	$61.47
76514 Ultrasound scan of cornea to determine thickness	91	91	$21.50	$10.49
92020 Examination of cornea and iris using lens device and slit lamp	90	90	$46.60	$26.95
92136 Measurement of corneal curvature and depth of eye	86	46	$120.00	$38.42
66984 Removal of cataract with insertion of lens	81	46	$1355.00	$532.93
92250 Photography of the retina	52	51	$85.50	$36.37
92134 Imaging of retina	39	39	$69.67	$39.69
66821 Removal of recurring cataract in lens capsule using a laser	26	17	$572.35	$306.28
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	24	24	$108.42	$108.29
66821 Removal of recurring cataract in lens capsule using a laser	22	14	$619.18	$330.56
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	13	13	$74.94	$74.84

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	919	782	$167.00	$123.14
92012 Established patient problem focused exam of visual system	355	232	$118.00	$87.68
92133 Imaging of optic nerve	306	304	$50.00	$35.80
92136 Measurement of corneal curvature and depth of eye	193	104	$120.00	$38.29
92083 Exam of visual field with extended testing	174	171	$85.00	$59.97
66984 Removal of cataract with insertion of lens	173	98	$1355.00	$523.66
92020 Examination of cornea and iris using lens device and slit lamp	147	146	$37.00	$26.96
92250 Photography of the retina	125	124	$86.00	$36.52
76514 Ultrasound scan of cornea to determine thickness	106	105	$21.00	$10.43
92134 Imaging of retina	90	83	$55.00	$39.51
66821 Removal of recurring cataract in lens capsule using a laser	73	50	$497.73	$301.39
92004 New patient complete exam of visual system	44	44	$199.00	$146.46
66821 Removal of recurring cataract in lens capsule using a laser	35	25	$491.00	$322.48
68841 Insertion of drug delivery implant into tear duct of eye	28	17	$84.00	$15.92
92060 Exam to measure eye deviation and range of motion	22	15	$86.00	$61.89
92201 Extended exam of the back part of the eye with retinal drawing	20	11	$34.00	$24.24
92283 Extended color vision examination	17	17	$65.00	$52.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	989	840	$167.00	$124.37
92012 Established patient problem focused exam of visual system	394	286	$118.00	$87.56
92133 Imaging of optic nerve	330	326	$50.00	$36.24
92136 Measurement of corneal curvature and depth of eye	248	134	$120.00	$40.31
66984 Removal of cataract with insertion of lens	233	136	$1355.00	$531.64
92083 Exam of visual field with extended testing	191	188	$85.00	$60.61
92020 Examination of cornea and iris using lens device and slit lamp	180	178	$37.00	$27.65
76514 Ultrasound scan of cornea to determine thickness	167	166	$21.00	$10.71
92004 New patient complete exam of visual system	132	132	$199.00	$147.91
92250 Photography of the retina	119	119	$86.00	$36.66
92134 Imaging of retina	99	91	$55.00	$39.94
68841 Insertion of drug delivery implant into tear duct of eye	60	35	$84.00	$15.90
65855 Laser repair to improve eye fluid flow	43	28	$600.00	$241.72
66821 Removal of recurring cataract in lens capsule using a laser	34	27	$491.00	$304.76
92201 Extended exam of the back part of the eye with retinal drawing	32	15	$34.00	$24.40
92060 Exam to measure eye deviation and range of motion	24	19	$86.00	$61.98
92002 New patient problem focused exam of visual system	20	20	$113.00	$84.91
92283 Extended color vision examination	17	17	$65.00	$49.52
66821 Removal of recurring cataract in lens capsule using a laser	15	12	$491.00	$287.90

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	1,016	852	$166.95	$125.57
92012 Established patient problem focused exam of visual system	373	277	$117.83	$89.07
92133 Imaging of optic nerve	301	300	$50.00	$36.77
92136 Measurement of corneal curvature and depth of eye	241	127	$120.00	$43.15
66984 Removal of cataract with insertion of lens	204	121	$1355.00	$536.13
92083 Exam of visual field with extended testing	199	196	$85.00	$61.79
92020 Examination of cornea and iris using lens device and slit lamp	178	175	$37.00	$27.67
76514 Ultrasound scan of cornea to determine thickness	160	159	$21.00	$10.83
92250 Photography of the retina	119	118	$86.00	$38.92
92004 New patient complete exam of visual system	105	105	$198.77	$148.64
92134 Imaging of retina	101	92	$55.00	$40.25
65855 Laser repair to improve eye fluid flow	48	30	$571.88	$246.05
0356T Insertion of drug delivery implant into tear ducts	44	26	$600.00	$122.84
92201 Extended exam of the back part of the eye with retinal drawing	43	19	$34.00	$24.83
66821 Removal of recurring cataract in lens capsule using a laser	43	34	$491.00	$309.14
92060 Exam to measure eye deviation and range of motion	25	19	$86.00	$62.85
92002 New patient problem focused exam of visual system	19	19	$112.68	$85.49
92283 Extended color vision examination	16	16	$65.00	$53.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	960	817	$166.57	$125.74
92012 Established patient problem focused exam of visual system	357	267	$116.64	$88.06
92133 Imaging of optic nerve	247	244	$50.00	$37.04
92136 Measurement of corneal curvature and depth of eye	229	119	$119.79	$47.54
92083 Exam of visual field with extended testing	184	180	$85.00	$62.09
66984 Removal of cataract with insertion of lens	180	107	$1355.00	$551.51
92020 Examination of cornea and iris using lens device and slit lamp	152	151	$36.93	$27.67
76514 Ultrasound scan of cornea to determine thickness	141	138	$21.00	$11.29
92250 Photography of the retina	103	102	$86.00	$44.92
92134 Imaging of retina	100	89	$55.00	$40.49
92004 New patient complete exam of visual system	95	95	$198.87	$148.98
0356T Insertion of drug delivery implant into tear ducts	59	39	$600.00	$118.64
66821 Removal of recurring cataract in lens capsule using a laser	52	36	$491.00	$330.93
65855 Laser repair to improve eye fluid flow	47	29	$465.00	$248.59
92201 Extended exam of the back part of the eye with retinal drawing	32	16	$34.00	$25.47
68761 Closure of tear duct opening using plug	21	13	$215.48	$127.66
66982 Complex removal of cataract with insertion of prosthetic lens	21	15	$1425.00	$756.70
92002 New patient problem focused exam of visual system	18	18	$111.00	$84.12
92060 Exam to measure eye deviation and range of motion	18	16	$86.00	$63.46
92283 Extended color vision examination	16	16	$65.00	$52.49
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	14	13	$190.00	$139.74

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	1,010	838	$162.89	$125.39
92012 Established patient problem focused exam of visual system	389	288	$113.00	$87.58
92136 Measurement of corneal curvature and depth of eye	255	133	$118.00	$51.33
92133 Imaging of optic nerve	237	234	$50.00	$36.99
66984 Removal of cataract with insertion of lens	223	129	$1355.00	$634.80
92083 Exam of visual field with extended testing	192	190	$85.00	$63.08
92020 Examination of cornea and iris using lens device and slit lamp	174	167	$36.00	$27.57
92250 Photography of the retina	117	116	$86.00	$49.87
66821 Removal of recurring cataract in lens capsule using a laser	115	80	$491.00	$322.17
76514 Ultrasound scan of cornea to determine thickness	102	101	$21.00	$11.91
92134 Imaging of retina	88	80	$55.00	$40.86
92004 New patient complete exam of visual system	86	86	$196.60	$146.50
65855 Laser repair to improve eye fluid flow	41	26	$465.00	$247.85
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	20	19	$190.00	$138.12
92225 Examination of eye by ophthalmoscope with retinal drawing	19	14	$36.00	$27.59
92002 New patient problem focused exam of visual system	17	17	$107.00	$80.31
92226 Examination of eye by ophthalmoscope with retinal drawing	16	11	$33.00	$25.43
92060 Exam to measure eye deviation and range of motion	15	15	$86.00	$63.41
92283 Extended color vision examination	12	12	$65.00	$53.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	1,109	899	$163.00	$123.58
92012 Established patient problem focused exam of visual system	414	276	$113.00	$86.11
92136 Measurement of corneal curvature and depth of eye	376	199	$118.00	$55.34
66984 Removal of cataract with insertion of lens	315	187	$1355.00	$624.07
92133 Imaging of optic nerve	269	265	$50.00	$37.19
92083 Exam of visual field with extended testing	200	195	$85.00	$62.39
92020 Examination of cornea and iris using lens device and slit lamp	173	166	$36.00	$26.48
92250 Photography of the retina	127	126	$86.00	$56.07
66821 Removal of recurring cataract in lens capsule using a laser	115	73	$491.00	$313.43
92004 New patient complete exam of visual system	92	92	$197.00	$146.31
65855 Laser repair to improve eye fluid flow	85	47	$465.00	$243.85
76514 Ultrasound scan of cornea to determine thickness	72	71	$21.00	$14.42
92134 Imaging of retina	57	51	$55.00	$40.98
92225 Examination of eye by ophthalmoscope with retinal drawing	24	19	$36.00	$24.77
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	24	23	$190.00	$136.25
66982 Complex removal of cataract with insertion of prosthetic lens	22	18	$1425.00	$790.26
92060 Exam to measure eye deviation and range of motion	21	17	$86.00	$60.96
92226 Examination of eye by ophthalmoscope with retinal drawing	20	12	$33.00	$22.44

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	1,055	921	$162.82	$119.98
66984 Removal of cataract with insertion of lens	425	257	$1355.00	$621.92
92012 Established patient problem focused exam of visual system	361	270	$112.91	$82.98
92136 Measurement of corneal curvature and depth of eye	324	264	$117.85	$76.57
92133 Imaging of optic nerve	217	215	$50.55	$36.38
92083 Exam of visual field with extended testing	189	183	$84.92	$62.38
65855 Laser repair to improve eye fluid flow	116	68	$465.00	$237.80
66821 Removal of recurring cataract in lens capsule using a laser	110	77	$490.35	$319.96
92004 New patient complete exam of visual system	90	90	$196.43	$140.79
92250 Photography of the retina	69	67	$90.41	$63.77
92134 Imaging of retina	63	53	$55.51	$38.83
92020 Examination of cornea and iris using lens device and slit lamp	41	41	$35.93	$25.67
76514 Ultrasound scan of cornea to determine thickness	39	39	$20.95	$14.27
66982 Complex removal of cataract with insertion of prosthetic lens	30	25	$1425.00	$781.56
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	23	22	$190.00	$135.53
92002 New patient problem focused exam of visual system	12	12	$107.00	$75.30
92060 Exam to measure eye deviation and range of motion	12	12	$85.83	$58.23

Medical Specialties & State Licenses

CMS Verified: 2026-06-29

Ophthalmology Primary Specialty

NUCC Taxonomy Code: 207W00000X

State License CA C205778

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.

Additional State Medicaid & Healthcare Payer Identifiers

Commercial Insurance / Payer ID Railroad Medicare

P00411373

Hospital & Practice Group Affiliations

Seibert Mobile Optometry Llc

12758 Honeygrove Ct, Saint Louis, MO 631464405

Phone: 24852821166

Career & Practice History Timeline

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

9 Historical Events

📍

Updated Practice Location June 29, 2026

Registered at 44439 17TH ST W # 210, LANCASTER, CA 935342831 (Tel: 8168383464)

📍

Updated Business Mailing Address June 29, 2026

Registered at 44439 17TH ST W # 210, LANCASTER, CA 935342831 (Tel: 8168383464)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 29, 2026

Ophthalmology (License #C205778 in CA)

✅

NPI Profile Active December 04, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location December 04, 2007

Registered at 1613 S 7 HWY, BLUE SPRINGS, MO 640143946 (Tel: 8164781230)

📍

Updated Business Mailing Address December 04, 2007

Registered at 4801 S CLIFF AVE, SUITE 100, INDEPENDENCE, MO 640557015 (Tel: 8164781230)

👤

Provider Name / Credentials Updated December 04, 2007

Recorded as NATHAN HAMAKER, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 04, 2007

Ophthalmology (License #2007010850 in MO)

🟢

Initial NPI Registration & Enumeration June 23, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1104852292

Entity Type:

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

Enumeration Date: June 23, 2006

Last Update: June 29, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

44439 17th St W # 210

Lancaster, CA 935342831

Phone: 8168383464

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.