Walter A. Koltun, MD
Colon & Rectal Surgery Physician · Hershey, PA
Walter A. Koltun, MD is a colon & rectal surgery physician with a practice address in Hershey, Pennsylvania, and NPI 1619934437, issued on Apr 26, 2006. Check the license (Pennsylvania MD041924L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Walter A. Koltun
- Credential
- MD
- Primary taxonomy
- Colon & Rectal Surgery Physician 208C00000X
- License number
- MD041924L PA
Self-reported in NPPES; status is on the state search - Practice location
- 500 University Dr, Hershey, PA 17033
- Phone
- (800) 233-4082
- Enumerated
- Apr 26, 2006
- Record last updated
- Jan 23, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicaid ID
- 0012159020002 PA
- Medicare enrollment
- Enrolled (PECOS I20101029000578); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1981
- Entity
- Type 1 · individual
8 nearest colon & rectal surgery physician records → All 122 in Pennsylvania → Look up another NPI →
Also registered at 500 University Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Victor Abarca, CRNACertified Registered Nurse Anesthetist1003575853
- Aiza Abbas, MDStudent in an Organized Health Care Education/Training Program1164312500
- Fatemeh Abbasi, MDPulmonary Disease Physician1750878625
- Andrea Abbe, LDNRegistered Dietitian1366623795
- Mahdi Abdallah, MDStudent in an Organized Health Care Education/Training Program1497457360
- Ashraf Abdelhalim, MDAnesthesiology Physician1356931729
Verify Walter A. Koltun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD041924LCheck 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): 71.8 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
- The Milton S Hershey Medical Center Physicians GroupHershey, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter A. Koltun among 122 colon & rectal surgery physician records in Pennsylvania
Walter A. Koltun, MD is one of 122 colon & rectal surgery physician records with a practice address in Pennsylvania. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 20% of them.
- NPI issued2006 · 20% of these records are older, 45% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1981 · median 2000 among the 91 with a school on file
- Record last updated2014 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208C00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Colon & Rectal Surgery Physician providers in Pennsylvania
There are 122 colon & rectal surgery physician records in Pennsylvania.
All 122 in Pennsylvania → Every provider in Hershey → Colon & Rectal Surgery Physician nationwide →
The 8 colon & rectal surgery physician records with the nearest ZIP codes
- Heather CarmichaelHershey, PA 170331063807279
- Jose Guillem, MDHershey, PA 170331902881444
- Audrey Kulaylat, M.D.Hershey, PA 170331346683083
- Patricio Lynn, MDHershey, PA 170331821478090
- Kevin McKenna, MDHershey, PA 170331043268634
- Douglas Murken, M.D.Hershey, PA 170331790047876
- Lisa Poritz, MDHershey, PA 170331427014505
- Jeffrey Scow, MDHershey, PA 170331255451423
Common questions
What is Walter A. Koltun, MD's NPI number?
Walter A. Koltun, MD's National Provider Identifier (NPI) is 1619934437, issued on Apr 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter A. Koltun, MD located?
The NPPES record lists a practice address at 500 University Dr, Hershey, PA, 17033. Phone: (800) 233-4082. Providers update this record themselves, so call before visiting.
How can I verify Walter A. Koltun, MD's license?
NPPES lists Pennsylvania license number MD041924L, 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 Walter A. Koltun, MD's MIPS final score?
The 2023 MIPS final score is 71.8 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.