Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gary J Della'Zanna, DO
Surgery Physician in Annapolis, MD · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1437146420
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Registry record
Entity type Individual (Type 1)
Name Dr. Gary J Della'Zanna
Credential DO
Sex Male
Practice address 2001 Medical Pkwy, Annapolis, MD, 21401
Phone (443) 481-1000
Fax (443) 481-1360
Enumeration date Oct 4, 2005
Last updated in NPPES Feb 25, 2009
Taxonomy & licenses
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD.
About the DO credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 5981556 | Other | MD | AETNA PPO |
| 145724700 | Other | MD | FEDERAL WORKMAN'S COMP |
| 3956478 | Other | MD | AETNA HMO |
| 936200201 407952300 | Medicaid | MD | - |
| K5850001 | Other | DC | CAREFIRST BCBS |
| 887BAA64575001 | Other | MD | CAREFIRST BCBS |
| 815643 131332 | Other | MD | JHHC |
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
What is the NPI number for Gary Della'Zanna?
The National Provider Identifier (NPI) for Gary Della'Zanna is 1437146420, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gary Della'Zanna practice?
The practice location on file with NPPES is in Annapolis, MD. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Karl Holschuh Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Annapolis, MD NPI 1548269343 Chang Choi Hospitalist Physician · Annapolis, MD NPI 1912907593 Nancy Snow Internal Medicine Physician · Annapolis, MD NPI 1295735975 Suzanne Sullivan Internal Medicine Physician · Annapolis, MD NPI 1992705578 Mohamed Moubarek Internal Medicine Physician · Annapolis, MD NPI 1194725648 Brown, Croft, Frazier, PA Diagnostic Radiology Physician · Annapolis, MD NPI 1902807324 Judy Joseph-Herbert Critical Care Medicine (Internal Medicine) Physician · Annapolis, MD NPI 1356342778 Okeowo Ibitoye Internal Medicine Physician · Annapolis, MD NPI 1154322352
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-25.