Mary Hernandez-Zhang, M.D.
NPI 1275652356 · Internal Medicine Physician · Houston, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Hernandez-Zhang, M.D. is a Internal Medicine Physician provider in Houston, TX (NPI 1275652356).
Provider details
- NPI number
- 1275652356
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- P0406 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
795 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 274 | $125 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 172 | $89 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 147 | $128 |
| Administration of Influenza Virus VaccineG0008 | 73 | $32 |
| Administration of Pneumococcal VaccineG0009 | 44 | $32 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 81 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 202 | 79 |
| Levothyroxine Sodium | 163 | 50 |
| Rosuvastatin Calcium | 157 | 59 |
| Amlodipine Besylate | 142 | 55 |
| Lisinopril | 90 | 37 |
| Gabapentin | 85 | 40 |
| Trazodone Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$122 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-28
- Last updated
- 2014-09-15
Frequently asked questions
- What is Mary Hernandez-Zhang's NPI number?
- Mary Hernandez-Zhang's National Provider Identifier (NPI) is 1275652356, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Hernandez-Zhang's specialty?
- Mary Hernandez-Zhang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Hernandez-Zhang located?
- Mary Hernandez-Zhang's practice location on file with NPPES is 2060 Space Park Dr, Houston, TX 77058-3600.
- What is Mary Hernandez-Zhang's phone number?
- The practice phone number listed in the NPPES registry for Mary Hernandez-Zhang is (281) 333-9747.
- Does Mary Hernandez-Zhang accept Medicare?
- Mary Hernandez-Zhang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Hernandez-Zhang's NPI active?
- Yes — Mary Hernandez-Zhang's NPI (1275652356) is active in the NPPES registry as of the last update on 2014-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.