Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Douglas Middleton Dahl, MD
Urology Physician in Boston, MA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639160807
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Registry record
Entity type Individual (Type 1)
Name Dr. Douglas Middleton Dahl
Credential MD
Sex Male
Practice address 55 Fruit St, Grb 1102, Boston, MA, 02114
Phone (617) 726-0875
Fax (617) 726-6131
Enumeration date Nov 4, 2005
Last updated in NPPES Jan 31, 2014
Taxonomy & licenses
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 |
|---|---|---|---|
| J31467 | Other | MA | BCBS MA |
| 3141063 | Medicaid | MA | - |
| 779428 | Other | MA | TUFTS HEALTH PLAN |
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 Douglas Dahl practice?
The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Douglas Dahl?
The National Provider Identifier (NPI) for Douglas Dahl is 1639160807, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-31.