NPPES file of Aug 9, 2026

Diana Maria Mercado-Marmarosh, M.D.

Family Medicine Physician · Edna, TX

Diana Maria Mercado-Marmarosh, M.D. is a family medicine physician with a practice address in Edna, Texas, and NPI 1619298643, issued on Jun 14, 2010. Check the license (Texas P8390, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1619298643
Name
Diana Maria Mercado-Marmarosh
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License numbers
P8390 TX
BP10036757 TX
Self-reported in NPPES; status is on the state search
Practice location
1013A S Wells St, Edna, TX 77957
Phone
(361) 782-7820
Enumerated
Jun 14, 2010
Record last updated
Nov 5, 2019 (not updated in 7 years: call before relying on the address or phone)
Fax
(361) 782-5627
Medicaid ID
332697703 TX
Medicare enrollment
Enrolled (PECOS I20140319001273); accepts Medicare assignment
Medical or professional school
University Of Texas Medical School At Houston, 2010
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →

Also registered at 1013A S Wells St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ashley Harris, FNP-CFamily Nurse Practitioner1134582885
  2. Cynthia Heibel, FNP-CFamily Nurse Practitioner1760476808
  3. Stephanie Laskowski, FNP-CFamily Nurse Practitioner1356826267
  4. Cesar Maldonado, M.D.Family Medicine Physician1235420878
  5. Jared Nielson, FNP-CFamily Nurse Practitioner1902363831

Verify Diana Maria Mercado-Marmarosh in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license P8390    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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48% more Medicare Part D claims than the average family medicine physician in 2024

5,245 Medicare Part D claims for 275 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 226 claims were for opioids.

  1. Diana Mercado-Marmarosh5,245
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium295 claims
  2. Lisinopril153 claims
  3. Levothyroxine Sodium145 claims
  4. Losartan Potassium135 claims
  5. Furosemide113 claims
  6. Gabapentin99 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: $279.22

15 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Diana Mercado-Marmarosh$279.22
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Jackson County Hospital DistrictEdna, TX

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Diana Maria Mercado-Marmarosh among 11,119 family medicine physician records in Texas

Diana Maria Mercado-Marmarosh, M.D. is one of 11,119 family 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 2010, is newer than 62% of them.

  • NPI issued2010 · 62% of these records are older, 36% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 64% of these records are
  • Graduated2010 · median 2004 among the 7,095 with a school on file
  • Record last updated2019 · 51% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

7 family medicine physician records list a practice address in Edna

They are 7 of the 54 NPPES records with a practice address in Edna, and 11,119 family medicine physician records in Texas.

All 11,119 in Texas → Every provider in Edna → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Deke Eberhard, M.D.Edna, TX 779571982135299
  2. Savithri Fernando, M.D.Edna, TX 779571912197518
  3. Cesar Maldonado, M.D.Edna, TX 779571235420878
  4. Jared Mitchell, M.D.Edna, TX 779571760914162
  5. Richard Nelson, M.D.Edna, TX 779571497029789
  6. Molly Quinn-Frankel, MDEdna, TX 779571689020992
  7. William Denton, D.O.Cuero, TX 779541417041690
  8. Daniel Dugi, M.D.Cuero, TX 779541598701344

Common questions

What is Diana Maria Mercado-Marmarosh, M.D.'s NPI number?

Diana Maria Mercado-Marmarosh, M.D.'s National Provider Identifier (NPI) is 1619298643, issued on Jun 14, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Diana Maria Mercado-Marmarosh, M.D. located?

The NPPES record lists a practice address at 1013A S Wells St, Edna, TX, 77957. Phone: (361) 782-7820. Providers update this record themselves, so call before visiting.

How can I verify Diana Maria Mercado-Marmarosh, M.D.'s license?

NPPES lists Texas license number P8390, 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 Diana Maria Mercado-Marmarosh, M.D. prescribe under Medicare Part D?

In 2024, Diana Maria Mercado-Marmarosh, M.D. had 5,245 Medicare Part D claims for 275 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.