Timothy Michael Patterson, D.O.
Internal Medicine Physician · Bryn Mawr, PA
Timothy Michael Patterson, D.O. is an internal medicine physician with a practice address in Bryn Mawr, Pennsylvania, and NPI 1902132871, issued on Oct 27, 2009. Check the license (Pennsylvania OS015421, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Timothy Michael Patterson
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- OS015421 PA
OT012423 PA
Self-reported in NPPES; status is on the state search - Practice location
- 933 E Haverford RD Ste 150, Bryn Mawr, PA 19010
- Phone
- (610) 520-5200
- Enumerated
- Oct 27, 2009
- Record last updated
- Sep 4, 2025
- Fax
- (610) 520-1998
- Medicare enrollment
- Enrolled (PECOS I20110616000593); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2004
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 933 E Haverford RD Ste 150
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Niranjini Chandrashekaran, MDInternal Medicine Physician1306596275
- Andrew Pitman, M.D.Pulmonary Disease Physician1679599948
Verify Timothy Michael Patterson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS015421Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% more Medicare Part D claims than the average internal medicine physician in 2024
4,438 Medicare Part D claims for 378 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 149 claims were for opioids.
Most prescribed
- Atorvastatin Calcium385 claims
- Amlodipine Besylate285 claims
- Lisinopril196 claims
- Levothyroxine Sodium173 claims
- Omeprazole126 claims
- Metformin Hcl121 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: $471.15
24 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. 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
- Main Line HealthcareBryn Mawr, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Michael Patterson among 7,300 internal medicine physician records in Pennsylvania
Timothy Michael Patterson, D.O. is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 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 47% of them.
- NPI issued2009 · 47% of these records are older, 50% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2004 · median 2008 among the 4,208 with a school on file
- Record last updated2025 · 56% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
49 internal medicine physician records list a practice address in Bryn Mawr
They are 49 of the 1,496 NPPES records with a practice address in Bryn Mawr, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Bryn Mawr → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Bonnie Ashby, MDBryn Mawr, PA 190101659350130
- Nahed Botros, DOBryn Mawr, PA 190101770556615
- Richard Brower, M.D.Bryn Mawr, PA 190101558331769
- Matthew Cahill, MDBryn Mawr, PA 190101528031325
- Madeline Danny, D.OBryn Mawr, PA 190101659311892
- Shalini Harigovind, MDBryn Mawr, PA 190101790759306
- Sivasankara Kosaraju, MDBryn Mawr, PA 190101558335919
- Lawrence McKnight, MDBryn Mawr, PA 190101013981166
Common questions
What is Timothy Michael Patterson, D.O.'s NPI number?
Timothy Michael Patterson, D.O.'s National Provider Identifier (NPI) is 1902132871, issued on Oct 27, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Michael Patterson, D.O. located?
The NPPES record lists a practice address at 933 E Haverford RD Ste 150, Bryn Mawr, PA, 19010. Phone: (610) 520-5200. Providers update this record themselves, so call before visiting.
How can I verify Timothy Michael Patterson, D.O.'s license?
NPPES lists Pennsylvania license number OS015421, 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 Timothy Michael Patterson, D.O. prescribe under Medicare Part D?
In 2024, Timothy Michael Patterson, D.O. had 4,438 Medicare Part D claims for 378 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.