Marichu Theresa A. Matas, M.D.
Internal Medicine Physician · Rockville, MD
Marichu Theresa A. Matas, M.D. is an internal medicine physician with a practice address in Rockville, Maryland, and NPI 1558526228, issued on Jul 22, 2008. Check the license (Maryland D0069148, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Marichu Theresa A. Matas
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- D0069148 MD
D69148 MD
Self-reported in NPPES; status is on the state search - Practice location
- 10110 Molecular Drive, Rockville, MD 20850
- Phone
- (301) 279-2779
- Enumerated
- Jul 22, 2008
- Record last updated
- Aug 12, 2025
- Fax
- (240) 403-0190
- Medicaid IDs
- 404776100 MD
026406700 MD - Medicare enrollment
- Enrolled (PECOS I20110307000840); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 10110 Molecular Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marichu Theresa A. Matas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0069148Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
380 Medicare Part D claims for 127 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass23 claims
- Metformin Hcl15 claims
- Prednisone15 claims
- Cefuroxime14 claims
- Clopidogrel14 claims
- Hydralazine Hcl14 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: $290.18
12 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. 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.
Bills Medicare through one group practice
- Galen Inpatient Physicians PCGermantown, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marichu Theresa A. Matas among 3,904 internal medicine physician records in Maryland
Marichu Theresa A. Matas, M.D. is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 39% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1990 · median 2003 among the 2,445 with a school on file
- Record last updated2025 · 59% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
179 internal medicine physician records list a practice address in Rockville
They are 179 of the 14,353 NPPES records with a practice address in Rockville, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Rockville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mehrdad Akhlaghi, MDRockville, MD 208501124019062
- Steven Braunstein, MDRockville, MD 208501720079502
- Mo-Ping Chow, M.D.Rockville, MD 208501801896550
- Atul Grover, MDRockville, MD 208501386635233
- Sudeepa Gupta, MDRockville, MD 208501134110653
- Konstantin Khludenev, MDRockville, MD 208501538154075
- Robert Kirkcaldy, MDRockville, MD 208501700877651
- Heather Lorenzo, MDRockville, MD 208501700877669
Common questions
What is Marichu Theresa A. Matas, M.D.'s NPI number?
Marichu Theresa A. Matas, M.D.'s National Provider Identifier (NPI) is 1558526228, issued on Jul 22, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Marichu Theresa A. Matas, M.D. located?
The NPPES record lists a practice address at 10110 Molecular Drive, Rockville, MD, 20850. Phone: (301) 279-2779. Providers update this record themselves, so call before visiting.
How can I verify Marichu Theresa A. Matas, M.D.'s license?
NPPES lists Maryland license number D0069148, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marichu Theresa A. Matas, M.D. prescribe under Medicare Part D?
In 2024, Marichu Theresa A. Matas, M.D. had 380 Medicare Part D claims for 127 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.