Active NPI 1972592384 Individual Practitioner Male Practitioner

Dr. Marshall Bowes Hamill , MD

Ophthalmology • Houston, TX

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Marshall Hamill, MD is a certified Ophthalmology practicing in Houston, TX. With approximately 47 years of clinical experience since graduating from Baylor College Of Medicine in 1979, Dr. Hamill delivers high-quality medical care to the local community at 6550 FANNIN ST.

Dr. Hamill is affiliated with Baylor College Of Medicine 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, measurement of corneal curvature and depth of eye. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

6550 Fannin St
Suite 1501

Houston, TX 770302717

Telephone 7137986100

Fax 7137984231

Associated Practice Facility / Clinic

🏢 Colon & Rectal Clinic, P. A. Facility NPI 1245223262

Medicare Profile & Education

Medical School

Baylor College Of Medicine

Graduation Year

1979

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Ophthalmology in Houston, TX

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

47 Yrs +22.1 yrs vs City Avg

City Avg: 24.9 Yrs

State Avg: 26.2 Yrs

Regional Practice Density

276 Specialists

Practicing in Houston, TX (1616 Statewide)

Telehealth Adoption Rate

1.8% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

78.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Hamill (47 Years) 47 Yrs

Houston Specialty Average (24.9 Years) 24.9 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	266	262	$344.00	$126.11
92012 Established patient problem focused exam of visual system	228	141	$244.00	$89.23
92136 Measurement of corneal curvature and depth of eye	144	74	$109.39	$37.17
66984 Removal of cataract with insertion of lens	76	57	$2701.00	$515.98
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	64	64	$465.00	$170.13
92004 New patient complete exam of visual system	29	29	$407.00	$150.63
65756 Transplantation of outer layer of corneal tissue	28	26	$5868.00	$1195.48
66982 Complex removal of cataract with insertion of prosthetic lens	19	16	$3702.00	$706.64
66821 Removal of recurring cataract in lens capsule using a laser	19	18	$1793.21	$365.11
76512 Ultrasound of eye disease, growth, or structure	13	11	$185.00	$48.14

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92012 Established patient problem focused exam of visual system	270	164	$248.00	$91.13
92014 Established patient complete exam of visual system	214	212	$348.00	$128.18
92136 Measurement of corneal curvature and depth of eye	179	86	$106.96	$37.00
66984 Removal of cataract with insertion of lens	98	75	$2707.00	$526.24
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	66	66	$461.00	$169.46
92004 New patient complete exam of visual system	35	35	$412.00	$153.04
65756 Transplantation of outer layer of corneal tissue	25	22	$5865.00	$1198.00
66821 Removal of recurring cataract in lens capsule using a laser	24	23	$1810.25	$369.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	14	$354.00	$131.19

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	240	238	$353.00	$131.61
92136 Measurement of corneal curvature and depth of eye	195	91	$109.10	$39.89
92012 Established patient problem focused exam of visual system	190	134	$249.00	$93.12
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	96	96	$464.00	$173.63
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	93	74	$356.00	$132.45
66984 Removal of cataract with insertion of lens	85	63	$2713.00	$542.64
92004 New patient complete exam of visual system	48	48	$418.00	$156.19
66821 Removal of recurring cataract in lens capsule using a laser	26	24	$1876.08	$389.06
65756 Transplantation of outer layer of corneal tissue	21	21	$5869.00	$1212.00
66982 Complex removal of cataract with insertion of prosthetic lens	16	14	$3716.00	$708.75

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	233	174	$153.00	$58.89
92014 Established patient complete exam of visual system	165	164	$339.00	$132.82
92012 Established patient problem focused exam of visual system	111	78	$240.00	$93.90
66984 Removal of cataract with insertion of lens	99	70	$2607.00	$539.37
76519 Ultrasound of eye for determination of lens power	86	84	$179.83	$69.76
0356T Insertion of drug delivery implant into tear ducts	73	55	$284.00	$108.09
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	69	69	$451.00	$172.26
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	60	55	$349.00	$133.87
92136 Measurement of corneal curvature and depth of eye	49	36	$90.61	$36.17
99202 New patient office or other outpatient visit, typically 20 minutes	28	28	$195.00	$75.43
65756 Transplantation of outer layer of corneal tissue	26	24	$5622.00	$1227.55
92134 Imaging of retina	25	22	$110.00	$42.69
66821 Removal of recurring cataract in lens capsule using a laser	22	21	$1784.56	$387.60
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	19	18	$63.00	$23.93
76512 Ultrasound of eye disease, growth, or structure	17	12	$135.12	$50.72
66982 Complex removal of cataract with insertion of prosthetic lens	14	11	$3569.00	$751.40
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	12	12	$300.00	$115.58
92004 New patient complete exam of visual system	12	12	$402.00	$157.91

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	273	270	$360.00	$130.71
92012 Established patient problem focused exam of visual system	253	157	$253.00	$92.53
92004 New patient complete exam of visual system	125	125	$429.00	$155.62
76519 Ultrasound of eye for determination of lens power	90	82	$191.00	$69.73
66984 Removal of cataract with insertion of lens	78	59	$2842.00	$542.66
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	69	65	$66.00	$24.33
0356T Insertion of drug delivery implant into tear ducts	36	27	$284.00	$104.39
92136 Measurement of corneal curvature and depth of eye	29	26	$102.28	$36.84
66821 Removal of recurring cataract in lens capsule using a laser	28	28	$1946.25	$392.60
65756 Transplantation of outer layer of corneal tissue	28	26	$6151.00	$1240.16
66982 Complex removal of cataract with insertion of prosthetic lens	21	18	$3900.00	$788.49
92134 Imaging of retina	17	17	$117.00	$42.69

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92012 Established patient problem focused exam of visual system	422	232	$251.00	$89.73
92014 Established patient complete exam of visual system	305	303	$359.00	$128.68
92004 New patient complete exam of visual system	165	165	$429.00	$151.14
76519 Ultrasound of eye for determination of lens power	147	136	$162.00	$57.02
66984 Removal of cataract with insertion of lens	136	101	$3308.44	$628.72
65756 Transplantation of outer layer of corneal tissue	43	42	$6144.00	$1219.73
92136 Measurement of corneal curvature and depth of eye	29	27	$105.03	$36.98
66821 Removal of recurring cataract in lens capsule using a laser	28	26	$1681.91	$334.11
92285 Photography of content of eyes	23	19	$62.00	$21.42
92134 Imaging of retina	22	20	$117.00	$42.10
66982 Complex removal of cataract with insertion of prosthetic lens	16	14	$4120.00	$780.23
92025 Ct scan of cornea	11	11	$75.00	$37.57

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92012 Established patient problem focused exam of visual system	406	225	$249.00	$87.73
92014 Established patient complete exam of visual system	362	352	$359.00	$127.66
76519 Ultrasound of eye for determination of lens power	136	112	$188.68	$67.51
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	97	97	$467.00	$165.40
66984 Removal of cataract with insertion of lens	81	65	$3325.00	$622.29
92004 New patient complete exam of visual system	74	74	$429.00	$148.90
92025 Ct scan of cornea	54	54	$75.00	$36.14
66984 Removal of cataract with insertion of lens	49	45	$3325.00	$627.76
92134 Imaging of retina	49	39	$119.00	$41.96
66821 Removal of recurring cataract in lens capsule using a laser	34	33	$1714.00	$337.50
92285 Photography of content of eyes	29	26	$59.00	$20.88
65756 Transplantation of outer layer of corneal tissue	26	25	$6096.81	$1196.00
76512 Ultrasound of eye disease, growth, or structure	16	13	$214.00	$74.46
92136 Measurement of corneal curvature and depth of eye	15	15	$188.27	$67.27
92002 New patient problem focused exam of visual system	14	14	$237.00	$83.37
65756 Transplantation of outer layer of corneal tissue	14	14	$6156.00	$1211.41
66982 Complex removal of cataract with insertion of prosthetic lens	12	11	$4132.00	$762.92
66986 Exchange of prosthetic lens	12	12	$4724.00	$890.85

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	367	363	$349.00	$123.83
92012 Established patient problem focused exam of visual system	362	228	$241.00	$85.59
76519 Ultrasound of eye for determination of lens power	231	174	$199.65	$70.83
66984 Removal of cataract with insertion of lens	183	131	$3295.00	$611.18
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	182	182	$463.00	$162.95
92025 Ct scan of cornea	182	173	$86.96	$34.97
65756 Transplantation of outer layer of corneal tissue	55	50	$5998.82	$1152.81
92134 Imaging of retina	52	40	$116.00	$41.16
76514 Ultrasound scan of cornea to determine thickness	46	43	$43.00	$14.06
66821 Removal of recurring cataract in lens capsule using a laser	28	24	$1694.00	$320.72
92285 Photography of content of eyes	23	16	$59.00	$20.30
66982 Complex removal of cataract with insertion of prosthetic lens	20	19	$4042.82	$792.33
76512 Ultrasound of eye disease, growth, or structure	17	16	$262.00	$92.38
66986 Exchange of prosthetic lens	16	16	$4679.00	$863.15
92002 New patient problem focused exam of visual system	13	13	$229.00	$81.19
65800 Removal of eye fluid	13	13	$612.00	$116.17
92004 New patient complete exam of visual system	11	11	$420.00	$148.02

Medical Specialties & State Licenses

Ophthalmology Primary Specialty

NUCC Taxonomy Code: 207W00000X

State License TX F4041

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

Medicaid State Provider ID

136036404 (TX)

Medicaid State Provider ID

136036403 (TX)

Medicaid State Provider ID

136036405 (TX)

Commercial Insurance / Payer ID Bc/bs

82W298 (TX)

Commercial Insurance / Payer ID Blue Link

2223279 (TX)

Hospital & Practice Group Affiliations

Baylor College Of Medicine

1504 Taub Loop, Houston, TX 770301608

Phone: 7138732000

Baylor College Of Medicine

2 Greenway Plz, Houston, TX 770460205

Baylor College Of Medicine

1977 Butler Boulevard 6th Floor, Houston, TX 770304101

Phone: 7137986131

Baylor College Of Medicine

1977 Butler Boulevard, Houston, TX 770304101

Baylor College Of Medicine

1977 Butler Blvd, Houston, TX 770304101

Baylor College Of Medicine

7200 Cambridge St, Houston, TX 770304202

Baylor College Of Medicine

1502 Taub Loop, Houston, TX 770301608

Phone: 7138734900

Practice Associates & Co-Workers

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

40 Associated Practitioners

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Doctor of Medicine (M.D.)

James Lai

Student in an Organized Health Care Education/Training Program

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Dr. Rod Foroozan , MD

Ophthalmology

NPI 1093704405

Doctor of Medicine (M.D.)

Dr. Masih Ahmed , MD

Ophthalmology

NPI 1114345725

Doctor of Medicine (M.D.)

Navnit Mohan

Student in an Organized Health Care Education/Training Program

NPI 1154051548

Dr. Elizabeth Baze , MD

Ophthalmology

NPI 1174512552

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active February 01, 2008

NPI status registered as active in NPPES database

📍

Updated Practice Location February 01, 2008

Registered at 6550 FANNIN ST, SUITE 1501, HOUSTON, TX 770302717 (Tel: 7137986100)

📍

Updated Business Mailing Address February 01, 2008

Registered at PO BOX 4771, HOUSTON, TX 772104771 (Tel: 7137986100)

👤

Provider Name / Credentials Updated February 01, 2008

Recorded as MARSHALL HAMILL, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 01, 2008

Ophthalmology (License #F4041 in TX)

🟢

Initial NPI Registration & Enumeration October 18, 2005

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: 1972592384

Entity Type:

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

Enumeration Date: October 18, 2005

Last Update: February 01, 2008

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 4771

Houston, TX 772104771

Phone: 7137986100

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.