Mark Jacobson, DO
Internal Medicine Physician · Lebanon, PA
Mark Jacobson, DO is an internal medicine physician with a practice address in Lebanon, Pennsylvania, and NPI 1407879554, issued on Jul 26, 2006. Check the license (Pennsylvania OS005977L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Jacobson
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS005977L PA
Self-reported in NPPES; status is on the state search - Practice location
- 4TH & Willow Street, Lebanon, PA 17042
- Phone
- (717) 272-4451
- Enumerated
- Jul 26, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (717) 272-4532
- Medicaid ID
- 01230300 PA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 4TH & Willow Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Aitken, MDFamily Medicine Physician1477510550
- Joseph Bering, MDObstetrics & Gynecology Physician1417982653
Verify Mark Jacobson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS005977LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Jacobson among 7,300 internal medicine physician records in Pennsylvania
Mark Jacobson, DO 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 not. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 64% newer
- In a Medicare fileNo · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2007 · 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).
30 internal medicine physician records list a practice address in Lebanon
They are 30 of the 1,756 NPPES records with a practice address in Lebanon, and 7,300 internal medicine physician records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,300 in Pennsylvania → Every provider in Lebanon → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Tamara Adams, M.D.Lebanon, PA 170421285626739
- Navneet Campbell, MDLebanon, PA 170421902887938
- Rachel Causak, MDLebanon, PA 170421407947195
- Bradley Davidson, M.D.Lebanon, PA 170421184715344
- Brian Fosnocht, M.D.Lebanon, PA 170421386652923
- John Halcovage, DOLebanon, PA 170421174582266
- Anne Hayes, M.D.Lebanon, PA 170421639161185
- Edwin Kase, M.D.Lebanon, PA 170421619969144
Common questions
What is Mark Jacobson, DO's NPI number?
Mark Jacobson, DO's National Provider Identifier (NPI) is 1407879554, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Jacobson, DO located?
The NPPES record lists a practice address at 4TH & Willow Street, Lebanon, PA, 17042. Phone: (717) 272-4451. Providers update this record themselves, so call before visiting.
How can I verify Mark Jacobson, DO's license?
NPPES lists Pennsylvania license number OS005977L, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.