Active NPI 1710169974 Individual Practitioner Female Practitioner

Dr. Marilyn Kay Kosier , MD

Ophthalmology • Lancaster, OH

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Marilyn Kosier, MD is a certified Ophthalmology practicing in Lancaster, OH. With approximately 46 years of clinical experience since graduating from Ohio State University College Of Medicine in 1980, Dr. Kosier delivers high-quality medical care to the local community at 1520 SHERIDAN DR.

Dr. Kosier 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, photography of the retina. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1520 Sheridan Dr

Lancaster, OH 431301303

Telephone 7406540177

Fax 7406540505

Associated Practice Facility / Clinic

🏢 Marilyn K. Kosier, M.d., Inc. Facility NPI 1730168402

Medicare Profile & Education

Medical School

Ohio State University College Of Medicine

Graduation Year

1980

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Ophthalmology in Lancaster, OH

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

46 Yrs +12.3 yrs vs City Avg

City Avg: 33.7 Yrs

State Avg: 27.9 Yrs

Regional Practice Density

4 Specialists

Practicing in Lancaster, OH (803 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

45.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Kosier (46 Years) 46 Yrs

Lancaster Specialty Average (33.7 Years) 33.7 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	302	301	$152.00	$116.78
92012 Established patient problem focused exam of visual system	292	190	$101.00	$82.72
92250 Photography of the retina	171	171	$69.98	$32.53
92083 Exam of visual field with extended testing	114	102	$109.75	$51.86
92133 Imaging of optic nerve	89	81	$73.17	$33.29
92134 Imaging of retina	81	71	$74.11	$34.69
92020 Examination of cornea and iris using lens device and slit lamp	81	69	$41.00	$25.67
92004 New patient complete exam of visual system	76	76	$188.00	$137.95
92136 Measurement of corneal curvature and depth of eye	61	39	$65.49	$30.19
99213 Established patient office or other outpatient visit, typically 15 minutes	56	53	$133.00	$85.64
66984 Removal of cataract with insertion of lens	49	32	$1087.00	$489.70
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	33	32	$196.00	$120.88
83861 Microfluid analysis of tears	26	12	$37.00	$22.03
92002 New patient problem focused exam of visual system	25	25	$92.00	$78.91
66821 Removal of recurring cataract in lens capsule using a laser	24	22	$625.00	$309.14
92082 Exam of visual field with intermediate testing	12	12	$77.33	$35.80

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	237	183	$101.32	$86.73
92014 Established patient complete exam of visual system	210	209	$151.44	$120.58
92136 Measurement of corneal curvature and depth of eye	135	53	$53.59	$24.20
92012 Established patient problem focused exam of visual system	130	111	$101.56	$85.66
92250 Photography of the retina	121	118	$79.55	$35.50
92083 Exam of visual field with extended testing	95	81	$115.61	$56.38
92020 Examination of cornea and iris using lens device and slit lamp	90	79	$46.50	$26.56
92134 Imaging of retina	69	59	$77.43	$38.52
66984 Removal of cataract with insertion of lens	64	40	$1039.42	$506.98
92133 Imaging of optic nerve	63	59	$74.59	$34.91
68841 Insertion of drug delivery implant into tear duct of eye	61	41	$54.67	$15.70
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	60	60	$150.10	$123.79
92004 New patient complete exam of visual system	46	46	$185.85	$140.85
92273 Full field recording of retinal electrical responses to external stimuli with interpretation and report	41	40	$165.51	$119.25
83861 Microfluid analysis of tears	25	13	$35.40	$22.03
66821 Removal of recurring cataract in lens capsule using a laser	23	22	$487.43	$317.86
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	22	22	$248.09	$161.83
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	19	19	$165.21	$108.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	416	270	$99.00	$88.00
92136 Measurement of corneal curvature and depth of eye	167	62	$50.00	$25.58
92250 Photography of the retina	145	144	$84.00	$35.52
92083 Exam of visual field with extended testing	119	115	$105.00	$55.88
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	116	112	$145.00	$124.27
92014 Established patient complete exam of visual system	106	106	$147.00	$120.40
92020 Examination of cornea and iris using lens device and slit lamp	100	86	$50.00	$27.11
66984 Removal of cataract with insertion of lens	89	53	$1000.00	$524.84
92134 Imaging of retina	72	64	$75.00	$39.10
92133 Imaging of optic nerve	69	66	$75.00	$34.56
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	65	65	$231.54	$159.21
92273 Full field recording of retinal electrical responses to external stimuli with interpretation and report	58	57	$150.00	$118.25
83861 Microfluid analysis of tears	43	22	$35.00	$22.14
68841 Insertion of drug delivery implant into tear duct of eye	41	26	$50.00	$15.67
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	29	29	$150.21	$109.88
92004 New patient complete exam of visual system	24	24	$175.00	$145.14
66821 Removal of recurring cataract in lens capsule using a laser	22	19	$399.00	$321.06
92081 Exam of visual field with limited testing	14	14	$75.00	$31.70

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	411	268	$98.91	$89.70
92250 Photography of the retina	199	189	$84.00	$37.76
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	187	186	$145.02	$127.34
92136 Measurement of corneal curvature and depth of eye	169	72	$76.63	$32.36
66984 Removal of cataract with insertion of lens	115	68	$1122.61	$518.27
92083 Exam of visual field with extended testing	112	108	$105.00	$59.48
92020 Examination of cornea and iris using lens device and slit lamp	108	88	$50.00	$27.27
92014 Established patient complete exam of visual system	99	99	$147.00	$122.86
83861 Microfluid analysis of tears	95	48	$35.00	$22.48
92134 Imaging of retina	77	68	$86.10	$39.64
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	70	70	$198.83	$164.61
92133 Imaging of optic nerve	63	60	$87.14	$35.73
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	28	28	$126.00	$111.01
92012 Established patient problem focused exam of visual system	26	26	$102.00	$86.39
92004 New patient complete exam of visual system	19	19	$175.00	$145.75
92273 Full field recording of retinal electrical responses to external stimuli with interpretation and report	18	18	$141.67	$121.76

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92012 Established patient problem focused exam of visual system	270	232	$102.00	$85.74
92014 Established patient complete exam of visual system	238	237	$147.00	$122.47
92250 Photography of the retina	223	221	$84.00	$42.62
99213 Established patient office or other outpatient visit, typically 15 minutes	217	164	$87.00	$73.57
83861 Microfluid analysis of tears	131	63	$35.00	$22.30
92083 Exam of visual field with extended testing	118	109	$105.00	$59.98
92136 Measurement of corneal curvature and depth of eye	112	59	$99.64	$39.91
92020 Examination of cornea and iris using lens device and slit lamp	100	92	$50.00	$27.17
66984 Removal of cataract with insertion of lens	88	57	$2800.00	$539.75
92004 New patient complete exam of visual system	85	85	$175.00	$146.26
92133 Imaging of optic nerve	61	58	$120.00	$34.54
92134 Imaging of retina	43	36	$120.00	$39.78
0509T Pattern recording of retinal electrical responses to external stimuli with interpretation and report	30	30	$150.00	$71.80
92002 New patient problem focused exam of visual system	27	27	$97.00	$81.75
68801 Dilation of tear drainage opening	26	20	$274.62	$96.02
66821 Removal of recurring cataract in lens capsule using a laser	26	22	$895.00	$325.51
83516 Analysis of substance using immunoassay technique	24	11	$25.00	$11.41
92081 Exam of visual field with limited testing	12	12	$75.00	$32.67

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	389	387	$141.05	$121.29
92012 Established patient problem focused exam of visual system	341	291	$97.04	$84.86
92250 Photography of the retina	321	315	$84.00	$47.54
83861 Microfluid analysis of tears	212	99	$35.00	$22.03
99213 Established patient office or other outpatient visit, typically 15 minutes	198	147	$84.42	$71.58
92136 Measurement of corneal curvature and depth of eye	180	89	$96.67	$42.97
92083 Exam of visual field with extended testing	146	140	$105.00	$58.34
92020 Examination of cornea and iris using lens device and slit lamp	125	116	$50.00	$26.78
66984 Removal of cataract with insertion of lens	124	82	$2800.00	$626.76
92004 New patient complete exam of visual system	115	115	$169.00	$146.30
92133 Imaging of optic nerve	97	90	$120.00	$34.06
0509T Pattern recording of retinal electrical responses to external stimuli with interpretation and report	82	81	$150.00	$75.20
92134 Imaging of retina	57	50	$120.00	$39.65
83516 Analysis of substance using immunoassay technique	40	21	$25.00	$12.55
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	35	34	$48.91	$43.49
92002 New patient problem focused exam of visual system	34	34	$92.00	$80.97
66821 Removal of recurring cataract in lens capsule using a laser	24	22	$895.00	$321.94
92081 Exam of visual field with limited testing	15	14	$75.00	$32.21
76514 Ultrasound scan of cornea to determine thickness	14	14	$40.00	$11.50

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92012 Established patient problem focused exam of visual system	508	358	$91.91	$83.03
92014 Established patient complete exam of visual system	445	443	$135.00	$119.98
92250 Photography of the retina	399	391	$84.00	$53.33
83861 Microfluid analysis of tears	202	93	$35.00	$22.03
92136 Measurement of corneal curvature and depth of eye	163	81	$100.37	$47.13
92083 Exam of visual field with extended testing	162	150	$105.00	$58.35
92020 Examination of cornea and iris using lens device and slit lamp	127	116	$50.00	$25.87
66984 Removal of cataract with insertion of lens	120	75	$2800.00	$619.14
92004 New patient complete exam of visual system	117	117	$165.00	$144.86
92133 Imaging of optic nerve	100	98	$120.00	$33.80
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	83	62	$48.00	$41.64
92275 Recording of retinal electrical responses to external stimuli	63	57	$200.00	$141.27
92002 New patient problem focused exam of visual system	55	55	$87.00	$78.29
92134 Imaging of retina	38	37	$120.00	$39.70
92285 Photography of content of eyes	27	27	$70.00	$18.39
65855 Laser repair to improve eye fluid flow	24	13	$905.00	$237.02
92081 Exam of visual field with limited testing	20	19	$75.00	$31.99
66821 Removal of recurring cataract in lens capsule using a laser	19	17	$895.00	$316.47
76514 Ultrasound scan of cornea to determine thickness	16	16	$40.00	$13.86

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	525	525	$135.00	$117.19
92012 Established patient problem focused exam of visual system	477	360	$92.00	$80.79
92250 Photography of the retina	424	419	$84.00	$60.55
83861 Microfluid analysis of tears	186	91	$35.00	$22.21
92136 Measurement of corneal curvature and depth of eye	173	85	$97.89	$51.34
92083 Exam of visual field with extended testing	172	168	$105.00	$59.14
66984 Removal of cataract with insertion of lens	138	86	$2800.00	$609.29
92004 New patient complete exam of visual system	136	136	$165.00	$141.66
92020 Examination of cornea and iris using lens device and slit lamp	126	116	$50.00	$25.81
92133 Imaging of optic nerve	109	108	$119.45	$32.99
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	81	53	$48.00	$41.47
92002 New patient problem focused exam of visual system	55	55	$87.00	$76.10
92134 Imaging of retina	53	48	$120.00	$39.03
92275 Recording of retinal electrical responses to external stimuli	44	42	$200.00	$139.47
92285 Photography of content of eyes	39	39	$70.00	$17.91
83516 Analysis of substance using immunoassay technique	36	18	$25.00	$15.50
66821 Removal of recurring cataract in lens capsule using a laser	29	26	$895.00	$313.13
76514 Ultrasound scan of cornea to determine thickness	25	25	$40.00	$13.54
65855 Laser repair to improve eye fluid flow	23	12	$905.00	$233.67
68801 Dilation of tear drainage opening	17	13	$255.00	$75.37
11440 Removal of noncancer skin growth of face, ears, eyelids, nose, lips, or mouth, 0.5 cm or less	13	12	$147.00	$122.36
92081 Exam of visual field with limited testing	11	11	$75.00	$32.14

Medical Specialties & State Licenses

CMS Verified: 2020-05-15

Ophthalmology Primary Specialty

NUCC Taxonomy Code: 207W00000X

State License OH 35-056213

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.

Specialist

NUCC Taxonomy Code: 174400000X

State License OH 35-05-6213K

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

0698142 (OH)

Commercial Insurance / Payer ID Anthem

000000119171 (OH)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active January 08, 2008

NPI status registered as active in NPPES database

📍

Updated Practice Location January 08, 2008

Registered at 1520 SHERIDAN DR, LANCASTER, OH 431301303 (Tel: 7406540177)

📍

Updated Business Mailing Address January 08, 2008

Registered at 1520 SHERIDAN DR, LANCASTER, OH 431301303 (Tel: 7406540177)

👤

Provider Name / Credentials Updated January 08, 2008

Recorded as MARILYN KOSIER, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 08, 2008

Specialist (License #35-05-6213K in OH)

🟢

Initial NPI Registration & Enumeration November 29, 2007

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: 1710169974

Entity Type:

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

Enumeration Date: November 29, 2007

Last Update: May 15, 2020

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

1520 Sheridan Dr

Lancaster, OH 431301303

Phone: 7406548424

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.