Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark J Ptacek, M.D.

Family Medicine Physician in Deadwood, SD · enumerated 2005.

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

National Provider Identifier

1083611958

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Mark J Ptacek

Credential M.D.

Sex Male

Practice address 71 Charles St, Deadwood, SD, 57732

Phone (605) 717-6431

Enumeration date Jul 7, 2005

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 16764 (NE) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 4872 (SD) 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
460423930	Other	NE	HUMANA
46042393011	Medicaid	NE	-
9214155	Other	NE	DAKOTA CARE
3859	Other	NE	MIDLANDS CHOICE
7988021	Other	NE	AETNA
0123937	Other	NE	MEDICA
06676	Other	NE	NEBRASKA BCBS
460423930	Other	NE	TRICARE

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

How do I verify Mark Ptacek's NPI record?

Cross-check NPI 1083611958 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1083611958 active?

Yes, as of the latest NPPES snapshot, NPI 1083611958 is active (record last updated 2022-07-21).

Other providers at this practice address

Browse all →

Elizabeth Sayler Internal Medicine Physician · Deadwood, SD NPI 1093718769 James Holloway Internal Medicine Physician · Deadwood, SD NPI 1346243813 Thomas Groeger Family Medicine Physician · Deadwood, SD NPI 1942203419 Regional Health Clinic/Center · Deadwood, SD NPI 1720025190 Helen Nichols Registered Dietitian · Deadwood, SD NPI 1568553410 Peggy Hubbard Physician Assistant · Deadwood, SD NPI 1154471282 Regional Health Network Inc Durable Medical Equipment & Medical Supplies · Deadwood, SD NPI 1194871194 Regional Health Physicians Inc Clinic/Center · Deadwood, SD NPI 1407997810

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.