Dianna Yan MD PC
NPI 1558599498 · Specialist · Gaithersburg, MD
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dianna Yan MD PC is a Specialist organization in Gaithersburg, MD (NPI 1558599498).
Provider details
- NPI number
- 1558599498
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- Dianna Yan, Owner(301) 963-0900
- License
- D43385 (MD)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
Mailing address
Registry dates
- Enumerated
- 2009-06-30
- Last updated
- 2009-07-07
Frequently asked questions
- What is Dianna Yan MD PC's NPI number?
- Dianna Yan MD PC's National Provider Identifier (NPI) is 1558599498, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Dianna Yan MD PC?
- Dianna Yan MD PC is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is Dianna Yan MD PC located?
- Dianna Yan MD PC's practice location on file with NPPES is 8909 Shady Grove Ct, Gaithersburg, MD 20877-1308.
- What is Dianna Yan MD PC's phone number?
- The practice phone number listed in the NPPES registry for Dianna Yan MD PC is (301) 963-0900.
- Does Dianna Yan MD PC accept Medicare?
- Dianna Yan MD PC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Dianna Yan MD PC?
- The authorized official listed on Dianna Yan MD PC's NPPES record is Dianna Yan, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Dianna Yan MD PC's NPI active?
- Yes — Dianna Yan MD PC's NPI (1558599498) is active in the NPPES registry as of the last update on 2009-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.