Clark Timothy Johnson, MD
Maternal & Fetal Medicine Physician · Harrisburg, PA
Clark Timothy Johnson, MD is a maternal & fetal medicine physician with a practice address in Harrisburg, Pennsylvania, and NPI 1497989305, issued on May 6, 2009. Check the license (Pennsylvania MD490154, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Clark Timothy Johnson
- Credential
- MD
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License numbers
- MD490154 PA
D76370 MD
Self-reported in NPPES; status is on the state search - Practice location
- 100 S 2ND St Ste 4B, Harrisburg, PA 17101
- Phone
- (717) 231-8472
- Enumerated
- May 6, 2009
- Record last updated
- Jul 7, 2025
- Fax
- (717) 231-8490
- Medicare enrollment
- Enrolled (PECOS I20150505000597); may accept Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 143 in Pennsylvania → Look up another NPI →
Also registered at 100 S 2ND St Ste 4B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fareeza AfzalObstetrics & Gynecology Physician1215557236
- Cayla BachmanNurse Practitioner1841061074
- Timothy Boley, M.D.Neonatal-Perinatal Medicine Physician1871569210
- Avi Hameroff, M.D.Obstetrics & Gynecology Physician1881091619
- Torey JordanGenetic Counselor (M.S.)1992329981
- Linnea Lundh, LCGCGenetic Counselor (M.S.)1548077373
Verify Clark Timothy Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD490154Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 76.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Sinai Hospital OF Baltimore, IncBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clark Timothy Johnson among 143 maternal & fetal medicine physician records in Pennsylvania
Clark Timothy Johnson, MD is one of 143 maternal & fetal medicine physician records with a practice address in Pennsylvania. 76% 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 66% of them.
- NPI issued2009 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2009 · median 2002 among the 99 with a school on file
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Maternal & Fetal Medicine Physician providers in Pennsylvania
There are 143 maternal & fetal medicine physician records in Pennsylvania.
All 143 in Pennsylvania → Every provider in Harrisburg → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- Lynn Amicone, DOHarrisburg, PA 171011295997617
- Christopher Plummer, DOHarrisburg, PA 171011538107644
- Erik Smith, D.O.Harrisburg, PA 171011881668176
- Terry Tressler, D.O.Harrisburg, PA 171011417938267
- William Curtin, MDHershey, PA 170331093749418
- James O'Brien, M.D.Hershey, PA 170331902203573
- Sonia Sajja, MDHershey, PA 170331073007308
- Shirley Sawai, M.D.Hershey, PA 170331952360356
Common questions
What is Clark Timothy Johnson, MD's NPI number?
Clark Timothy Johnson, MD's National Provider Identifier (NPI) is 1497989305, issued on May 6, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Clark Timothy Johnson, MD located?
The NPPES record lists a practice address at 100 S 2ND St Ste 4B, Harrisburg, PA, 17101. Phone: (717) 231-8472. Providers update this record themselves, so call before visiting.
How can I verify Clark Timothy Johnson, MD's license?
NPPES lists Pennsylvania license number MD490154, 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.
What is Clark Timothy Johnson, MD's MIPS final score?
The 2023 MIPS final score is 76.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.