Tammy Lynn Underwood, FNP-C
Family Medicine Physician · Claysville, PA
Tammy Lynn Underwood, FNP-C is a family medicine physician with a practice address in Claysville, Pennsylvania, and NPI 1902587405, issued on Jul 27, 2023. Check the license (Pennsylvania SP027909, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Tammy Lynn Underwood
- Credential
- FNP-C
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- SP027909 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1263 Route 40 W, Claysville, PA 15323
- Phone
- (724) 663-7731
- Enumerated
- Jul 27, 2023
- Record last updated
- Jul 27, 2023
- Medicare enrollment
- Enrolled (PECOS I20230930000284); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2023
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 7,483 in Pennsylvania → Look up another NPI →
Also registered at 1263 Route 40 W
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Frederick Landenwitsch, MDFamily Medicine Physician1427001783
- Mark Mamros, M.D.Family Medicine Physician1245221829
- Jennifer MayFamily Nurse Practitioner1295396943
- John Six, MDFamily Medicine Physician1750332342
- Jay Ziegler, M.D.Family Medicine Physician1386697662
Verify Tammy Lynn Underwood in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license SP027909Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% fewer Medicare Part D claims than the average family medicine physician in 2024
2,721 Medicare Part D claims for 502 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 24 claims were for opioids.
Most prescribed
- Amlodipine Besylate138 claims
- Atorvastatin Calcium137 claims
- Lisinopril98 claims
- Levothyroxine Sodium90 claims
- Metformin Hcl88 claims
- Pantoprazole Sodium84 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: $565.68
22 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
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
- Preferred Primary Care Physicians, Inc.Claysville, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tammy Lynn Underwood among 7,483 family medicine physician records in Pennsylvania
Tammy Lynn Underwood, FNP-C is one of 7,483 family medicine physician records with a practice address in Pennsylvania. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 92% of them.
- NPI issued2023 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2023 · median 2005 among the 4,529 with a school on file
- Record last updated2023 · 58% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 family medicine physician records list a practice address in Claysville
They are 10 of the 25 NPPES records with a practice address in Claysville, and 7,483 family medicine physician records in Pennsylvania.
All 7,483 in Pennsylvania → Every provider in Claysville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Frederick Landenwitsch, MDClaysville, PA 153231427001783
- Mark Mamros, M.D.Claysville, PA 153231245221829
- Elizabeth Oshnock, DOClaysville, PA 153231750527529
- Kristen Romesburg, DOClaysville, PA 153231467698225
- John Six, MDClaysville, PA 153231750332342
- Brian Szklinski, M.DClaysville, PA 153231902897770
- Abigail Templeton, M.D.Claysville, PA 153231194978486
- Sarah White, DOClaysville, PA 153231225474315
Common questions
What is Tammy Lynn Underwood, FNP-C's NPI number?
Tammy Lynn Underwood, FNP-C's National Provider Identifier (NPI) is 1902587405, issued on Jul 27, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Tammy Lynn Underwood, FNP-C located?
The NPPES record lists a practice address at 1263 Route 40 W, Claysville, PA, 15323. Phone: (724) 663-7731. Providers update this record themselves, so call before visiting.
How can I verify Tammy Lynn Underwood, FNP-C's license?
NPPES lists Pennsylvania license number SP027909, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Tammy Lynn Underwood, FNP-C prescribe under Medicare Part D?
In 2024, Tammy Lynn Underwood, FNP-C had 2,721 Medicare Part D claims for 502 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.
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.