Charity Halphen Grannis, M.D.
Ophthalmology Physician · Houston, TX
Charity Halphen Grannis, M.D. is an ophthalmology physician with a practice address in Houston, Texas, and NPI 1629380977, issued on Jul 1, 2010. Check the license (Texas Q0056, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Charity Halphen Grannis
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- Q0056 TX
Self-reported in NPPES; status is on the state search - Practice location
- 2855 Gramercy St, Houston, TX 77025
- Phone
- (713) 668-6828
- Enumerated
- Jul 1, 2010
- Record last updated
- Mar 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 350244502 TX
- Medicare enrollment
- Enrolled (PECOS I20150805007392); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,514 in Texas → Look up another NPI →
Also registered at 2855 Gramercy St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeffrey Arnoult, MDOphthalmology Physician1396730065
- Sophia Asaria, ODOptometrist1740537208
- William Banks, MDOphthalmology Physician1891769477
- Chia-Kai Chu, MDOphthalmology Physician1356684674
- Carlos Gonzales, M.D.Ophthalmology Physician1306831060
- John Goosey, M.D.Ophthalmology Physician1215922406
Verify Charity Halphen Grannis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license Q0056Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average ophthalmology physician in 2024
289 Medicare Part D claims for 100 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 40% of claims.
Most prescribed
- Neomycin-Polymyxin-Dexameth50 claims
- Latanoprost45 claims
- Prednisolone Acetate42 claims
- Ketorolac Tromethamine37 claims
- Ofloxacin37 claims
- Restasis18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 93.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Hea Clinic PAHouston, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charity Halphen Grannis among 1,514 ophthalmology physician records in Texas
Charity Halphen Grannis, M.D. is one of 1,514 ophthalmology physician records with a practice address in Texas. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 68% of them.
- NPI issued2010 · 68% of these records are older, 30% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2010 · median 2003 among the 1,052 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Texas
There are 1,514 ophthalmology physician records in Texas.
All 1,514 in Texas → Every provider in Houston → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- John Goosey, M.D.Houston, TX 770251215922406
- Kenneth Hyde, M.D.Houston, TX 770251629063383
- Richard Kimbrough, M.D.Houston, TX 770251437144615
- James Lai, MDHouston, TX 770251699760447
- Jeffrey Lanier, MDHouston, TX 770251669467759
- Bailey Lee, MDHouston, TX 770251619962461
- Kathryn Musgrove, MDHouston, TX 770251326033424
- William Quayle, M.D.Houston, TX 770251144215336
Common questions
What is Charity Halphen Grannis, M.D.'s NPI number?
Charity Halphen Grannis, M.D.'s National Provider Identifier (NPI) is 1629380977, issued on Jul 1, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Charity Halphen Grannis, M.D. located?
The NPPES record lists a practice address at 2855 Gramercy St, Houston, TX, 77025. Phone: (713) 668-6828. Providers update this record themselves, so call before visiting.
How can I verify Charity Halphen Grannis, M.D.'s license?
NPPES lists Texas license number Q0056, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Charity Halphen Grannis, M.D. prescribe under Medicare Part D?
In 2024, Charity Halphen Grannis, M.D. had 289 Medicare Part D claims for 100 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Charity Halphen Grannis, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.