Charity Grannis, M.D.
NPI 1629380977 · Ophthalmology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charity Grannis, M.D. is a Ophthalmology Physician provider in Houston, TX (NPI 1629380977).
Provider details
- NPI number
- 1629380977
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- Q0056 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
441 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Exam to Measure Eye Deviation and Range of Motion92060 | 196 | $64 |
| Established Patient Problem Focused Exam of Visual System92012 | 94 | $88 |
| Established Patient Complete Exam of Visual System92014 | 74 | $126 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 19 | $553 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 17 | $44 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 15 | $130 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 50 | 41 |
| Latanoprost | 45 | — |
| Prednisolone Acetate | 42 | 31 |
| Ketorolac Tromethamine | 37 | 24 |
| Ofloxacin | 37 | 24 |
| Cyclosporinebrand: Restasis | 18 | — |
| Lifitegrastbrand: Xiidra | 13 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-07-01
- Last updated
- 2021-03-19
- Certified
- 2021-03-19
Frequently asked questions
- What is Charity Grannis's NPI number?
- Charity Grannis's National Provider Identifier (NPI) is 1629380977, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charity Grannis's specialty?
- Charity Grannis is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Charity Grannis located?
- Charity Grannis's practice location on file with NPPES is 2855 Gramercy St, Houston, TX 77025-1756.
- What is Charity Grannis's phone number?
- The practice phone number listed in the NPPES registry for Charity Grannis is (713) 668-6828.
- Does Charity Grannis accept Medicare?
- Charity Grannis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charity Grannis's NPI active?
- Yes — Charity Grannis's NPI (1629380977) is active in the NPPES registry as of the last update on 2021-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.