Mary Haven Merkle, MD
NPI 1164406732 · Internal Medicine Physician · Houston, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Haven Merkle, MD is a Internal Medicine Physician provider in Houston, TX (NPI 1164406732).
Provider details
- NPI number
- 1164406732
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- K0133 (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 tenure25% of score
20 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
560 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 273 | $99 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 59 | $99 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 52 | $165 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 44 | $123 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 30 | $122 |
| Advance Care Planning, First 30 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 141 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 640 | 45 |
| Apixabanbrand: Eliquis | 610 | 43 |
| Atorvastatin Calcium | 393 | 80 |
| Furosemide | 253 | 42 |
| Pantoprazole Sodium | 251 | 58 |
| Mirtazapine | 234 | 34 |
| Donepezil Hcl | 200 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$81 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
- 2005-12-06
- Last updated
- 2010-03-05
Frequently asked questions
- What is Mary Haven Merkle's NPI number?
- Mary Haven Merkle's National Provider Identifier (NPI) is 1164406732, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Haven Merkle's specialty?
- Mary Haven Merkle is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Haven Merkle located?
- Mary Haven Merkle's practice location on file with NPPES is 710 Fm 1960 West, Houston, TX 77090-3402.
- What is Mary Haven Merkle's phone number?
- The practice phone number listed in the NPPES registry for Mary Haven Merkle is (281) 440-2692.
- Does Mary Haven Merkle accept Medicare?
- Mary Haven Merkle is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Haven Merkle's NPI active?
- Yes — Mary Haven Merkle's NPI (1164406732) is active in the NPPES registry as of the last update on 2010-03-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.