Marian Penelope Thomas, FNP-BC
Family Nurse Practitioner · Oakland, MD
Marian Penelope Thomas, FNP-BC is a family nurse practitioner with a practice address in Oakland, Maryland, and NPI 1154879591, issued on Sep 14, 2016. Check the license (Maryland R26387, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marian Penelope Thomas
- Credential
- FNP-BC
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- R26387 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1027 Memorial Dr, Oakland, MD 21550
- Phone
- (301) 533-3300
- Enumerated
- Sep 14, 2016
- Record last updated
- Feb 18, 2025
- Fax
- (833) 448-0361
- Medicare enrollment
- Enrolled (PECOS I20200117000617); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,124 in Maryland → Look up another NPI →
Also registered at 1027 Memorial Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marian Penelope Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R26387Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average family nurse practitioner in 2024
811 Medicare Part D claims for 184 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Levothyroxine Sodium32 claims
- Metformin Hcl28 claims
- Fluticasone Propionate23 claims
- Amoxicillin-Clavulanate Potass22 claims
- Atorvastatin Calcium21 claims
- Lisinopril21 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: $15.95
1 payment: food and beverage; the largest payer was Novo Nordisk Inc. The 99,489 providers of this specialty with any payment received $650.95 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
- Western Maryland Health Care CorporationOakland, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marian Penelope Thomas among 4,124 family nurse practitioner records in Maryland
Marian Penelope Thomas, FNP-BC is one of 4,124 family nurse practitioner records with a practice address in Maryland. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 33% of them.
- NPI issued2016 · 33% of these records are older, 61% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2016 · median 2019 among the 2,370 with a school on file
- Record last updated2025 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 family nurse practitioner records list a practice address in Oakland
They are 33 of the 304 NPPES records with a practice address in Oakland, and 4,124 family nurse practitioner records in Maryland.
All 4,124 in Maryland → Every provider in Oakland → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Susan Bennett, FNP-COakland, MD 215501205359981
- Linda Bonnette, CRNPOakland, MD 215501821082538
- Rachel Friend-Lantz, NP-COakland, MD 215501649562901
- Elyzabeth Goralski, CRNPOakland, MD 215501265884464
- Laurel Grant, CRNPOakland, MD 215501487750170
- Lori Gregory, CRNPOakland, MD 215501275086274
- Kenneth Hawk, NPOakland, MD 215501427047240
- Lawrence Knapp, CRNPOakland, MD 215501831563907
Common questions
What is Marian Penelope Thomas, FNP-BC's NPI number?
Marian Penelope Thomas, FNP-BC's National Provider Identifier (NPI) is 1154879591, issued on Sep 14, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Marian Penelope Thomas, FNP-BC located?
The NPPES record lists a practice address at 1027 Memorial Dr, Oakland, MD, 21550. Phone: (301) 533-3300. Providers update this record themselves, so call before visiting.
How can I verify Marian Penelope Thomas, FNP-BC's license?
NPPES lists Maryland license number R26387, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Marian Penelope Thomas, FNP-BC prescribe under Medicare Part D?
In 2024, Marian Penelope Thomas, FNP-BC had 811 Medicare Part D claims for 184 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.