Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark E Heiny, MD, PHD

Pediatric Hematology & Oncology Physician in Indianapolis, IN · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1336198985

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mark E Heiny

Credential MD, PHD

Sex Male

Practice address 8326 Naab Rd, Indianapolis, IN, 46260

Phone (317) 871-0000

Fax (317) 871-0010

Enumeration date May 10, 2006

Last updated in NPPES Feb 11, 2015

Taxonomy & licenses

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 01045220A (IN) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
200113750	Medicaid	IN	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1336198985 active?

Yes, as of the latest NPPES snapshot, NPI 1336198985 is active (record last updated 2015-02-11).

How do I verify Mark Heiny's NPI record?

Cross-check NPI 1336198985 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-11.