OrganizationActive
Alfonso Tan MD PC
NPI 1548348758 · Internal Medicine Physician · Sayville, NY
Alfonso Tan MD PC is a Internal Medicine Physician organization in Sayville, NY (NPI 1548348758).
Provider details
- NPI number
- 1548348758
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Alfonso Tan, President(631) 589-2323
- License
- 115465 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
297 W Main St
Sayville, NY 11782-2523
Phone: (631) 589-2323
Fax: (631) 589-9069
Street-level locationGet directions
Mailing address
297 W Main St
Sayville, NY 11782-2523
Registry dates
- Enumerated
- 2006-11-02
- Last updated
- 2007-11-02
Frequently asked questions
- What is Alfonso Tan MD PC's NPI number?
- Alfonso Tan MD PC's National Provider Identifier (NPI) is 1548348758, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Alfonso Tan MD PC?
- Alfonso Tan MD PC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alfonso Tan MD PC located?
- Alfonso Tan MD PC's practice location on file with NPPES is 297 W Main St, Sayville, NY 11782-2523.
- What is Alfonso Tan MD PC's phone number?
- The practice phone number listed in the NPPES registry for Alfonso Tan MD PC is (631) 589-2323.
- Who is the authorized official for Alfonso Tan MD PC?
- The authorized official listed on Alfonso Tan MD PC's NPPES record is Alfonso Tan, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Alfonso Tan MD PC's NPI active?
- Yes — Alfonso Tan MD PC's NPI (1548348758) is active in the NPPES registry as of the last update on 2007-11-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.