Martha L. Flagg, NP
Acute Care Nurse Practitioner · San Antonio, TX
Martha L. Flagg, NP is an acute care nurse practitioner with a practice address in San Antonio, Texas, and NPI 1689908832, issued on Sep 21, 2009. Check the license (Texas AP118220, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Martha L. Flagg
- Credential
- NP
- Primary taxonomy
- Acute Care Nurse Practitioner 363LA2100X
- License number
- AP118220 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4330 Medical Dr, San Antonio, TX 78229
- Phone
- (210) 576-5306
- Enumerated
- Sep 21, 2009
- Record last updated
- Jul 15, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (210) 694-0645
- Medicaid ID
- 208412102 TX
- Medicare enrollment
- Enrolled (PECOS I20091123000614); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest acute care nurse practitioner records → All 3,239 in Texas → Look up another NPI →
Also registered at 4330 Medical Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Thomas Bienen, M.D.Internal Medicine Physician1952581746
- Stephanie Bruno, APRNFamily Nurse Practitioner1134560667
- Darius Buzenas, M.D.Internal Medicine Physician1609019272
- William Davis, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1437195187
Verify Martha L. Flagg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Texas board licenses this profession
Search for license AP118220Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average acute care nurse practitioner in 2024
365 Medicare Part D claims for 175 beneficiaries, against an average of 594 among the 13,133 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 23 claims were for opioids.
Most prescribed
- Cefdinir20 claims
- Carvedilol16 claims
- Atorvastatin Calcium14 claims
- Torsemide14 claims
- Tramadol Hcl14 claims
- Amoxicillin-Clavulanate Potass11 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.
Bills Medicare through one group practice
- Usacs Integrated Acute Care Services OF Texas, PLLCKerrville, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Martha L. Flagg among 3,239 acute care nurse practitioner records in Texas
Martha L. Flagg, NP is one of 3,239 acute care nurse practitioner records with a practice address in Texas. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 9% of them.
- NPI issued2009 · 9% of these records are older, 90% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1992 · median 2019 among the 2,120 with a school on file
- Record last updated2015 · 34% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2100X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Acute Care Nurse Practitioner providers in Texas
There are 3,239 acute care nurse practitioner records in Texas.
All 3,239 in Texas → Every provider in San Antonio → Acute Care Nurse Practitioner nationwide →
The 8 acute care nurse practitioner records with the nearest ZIP codes
- Patricia Botello, ACNP-BCSan Antonio, TX 782291205137007
- Monica Hall, MSN, RN, ACNP-BCSan Antonio, TX 782291598997702
- Kim Hanks, ACNPSan Antonio, TX 782291780974550
- Marc Koch, ACNPSan Antonio, TX 782291902094154
- Angela Pal, MSN, RN, ACNP-BCSan Antonio, TX 782291609104454
- Wen Pao, ACNPSan Antonio, TX 782291780976951
- Karina Perry, APNSan Antonio, TX 782291295980597
- Lexa Rijos, RN, ACNP-BCSan Antonio, TX 782291689826083
Common questions
What is Martha L. Flagg, NP's NPI number?
Martha L. Flagg, NP's National Provider Identifier (NPI) is 1689908832, issued on Sep 21, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Martha L. Flagg, NP located?
The NPPES record lists a practice address at 4330 Medical Dr, San Antonio, TX, 78229. Phone: (210) 576-5306. Providers update this record themselves, so call before visiting.
How can I verify Martha L. Flagg, NP's license?
NPPES lists Texas license number AP118220, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.
How much does Martha L. Flagg, NP prescribe under Medicare Part D?
In 2024, Martha L. Flagg, NP had 365 Medicare Part D claims for 175 beneficiaries; the average among acute care nurse practitioner prescribers was 594. 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.