Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory Clark Swistak, D.C.
Chiropractor in Gaithersburg, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1619052735
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Registry record
Entity type Individual (Type 1)
Name Dr. Gregory Clark Swistak
Credential D.C.
Sex Male
Practice address 60 Market St, 215, Gaithersburg, MD, 20878
Phone (301) 963-8333
Fax (301) 963-9330
Enumeration date Oct 26, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| J9770001 | Other | DC | BCBS |
| 1ST HEALTH | Other | MD | P3449828 |
| 606996-02189B | Other | MD | BCBS |
| 10435522 | Other | MD | CAQH |
| 624464 | Other | MD | MAMSI |
| 224657 | Other | MD | KAISER/ACN |
| 3638973 | Other | MD | AETNA HMO |
| 7662053 | Other | MD | AETNA PPO |
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.
Frequently asked questions
Where does Gregory Swistak practice?
The practice location on file with NPPES is in Gaithersburg, MD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gregory Swistak?
The National Provider Identifier (NPI) for Gregory Swistak is 1619052735, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Jon M Sherman D.P.M PC Podiatrist · Gaithersburg, MD NPI 1457353195 Chitra Guafari DDS PC Dentist · Gaithersburg, MD NPI 1356321160 Swistak Chiropractic PC Chiropractor · Gaithersburg, MD NPI 1336213479 Elite Performance & Physical Therapy Physical Therapist · Gaithersburg, MD NPI 1770615510 Robert Duvall Physical Therapist · Gaithersburg, MD NPI 1811029796 Gaithersburg Foot and Ankle Surgery Center Ambulatory Surgical Clinic/Center · Gaithersburg, MD NPI 1760507834 Jacie Enterprises Physical Therapist · Gaithersburg, MD NPI 1578743910 Jonathan Sherman Foot & Ankle Surgery Podiatrist · Gaithersburg, MD NPI 1205012754
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.