Mary Haven Merkle, MD
Internal Medicine Physician · Houston, TX
Mary Haven Merkle, MD is an internal medicine physician with a practice address in Houston, Texas, and NPI 1164406732, issued on Dec 6, 2005. Check the license (Texas K0133, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mary Haven Merkle
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- K0133 TX
Self-reported in NPPES; status is on the state search - Practice location
- 710 FM 1960 West, Houston, TX 77090
- Phone
- (281) 440-2692
- Enumerated
- Dec 6, 2005
- Record last updated
- Mar 5, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (281) 440-2653
- Medicaid ID
- 100338601 TX
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 710 FM 1960 West
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary Haven Merkle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license K0133Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average internal medicine physician in 2024
8,885 Medicare Part D claims for 301 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 80 claims were for opioids.
Most prescribed
- Levothyroxine Sodium640 claims
- Eliquis610 claims
- Atorvastatin Calcium393 claims
- Furosemide253 claims
- Pantoprazole Sodium251 claims
- Mirtazapine234 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.
Industry payments in 2024: $80.66
1 payment: food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mary Haven Merkle among 9,175 internal medicine physician records in Texas
Mary Haven Merkle, MD is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2010 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,488 internal medicine physician records list a practice address in Houston
They are 1,488 of the 61,221 NPPES records with a practice address in Houston, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Houston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Syed Ahmed, M.D.Houston, TX 770901255378352
- Hussamaddin Al Khadour, M.D.Houston, TX 770901396730230
- Anand Balasubramanian, M.D.Houston, TX 770901811939606
- Christopher Cloteaux, MDHouston, TX 770901780619379
- William Couch, MDHouston, TX 770901083687677
- Jinping Fan, MDHouston, TX 770901134308877
- Denise Giuffrida, MDHouston, TX 770901801808076
- Srilakshmi Konidala, M.D.Houston, TX 770901134323462
Common questions
What is Mary Haven Merkle, MD's NPI number?
Mary Haven Merkle, MD's National Provider Identifier (NPI) is 1164406732, issued on Dec 6, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary Haven Merkle, MD located?
The NPPES record lists a practice address at 710 FM 1960 West, Houston, TX, 77090. Phone: (281) 440-2692. Providers update this record themselves, so call before visiting.
How can I verify Mary Haven Merkle, MD's license?
NPPES lists Texas license number K0133, 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 Mary Haven Merkle, MD prescribe under Medicare Part D?
In 2024, Mary Haven Merkle, MD had 8,885 Medicare Part D claims for 301 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.