Cynthia Serabyn, DO
NPI 1619990389 · Internal Medicine Physician · Upland, CA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cynthia Serabyn, DO is a Internal Medicine Physician provider in Upland, CA (NPI 1619990389).
Provider details
- NPI number
- 1619990389
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 20A6287 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
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
Mailing address
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2007-07-08
Frequently asked questions
- What is Cynthia Serabyn's NPI number?
- Cynthia Serabyn's National Provider Identifier (NPI) is 1619990389, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cynthia Serabyn's specialty?
- Cynthia Serabyn is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Cynthia Serabyn located?
- Cynthia Serabyn's practice location on file with NPPES is 1238 E Arrow Hwy, Upland, CA 91786-4951.
- What is Cynthia Serabyn's phone number?
- The practice phone number listed in the NPPES registry for Cynthia Serabyn is (909) 946-5348.
- Does Cynthia Serabyn accept Medicare?
- Cynthia Serabyn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cynthia Serabyn's NPI active?
- Yes — Cynthia Serabyn's NPI (1619990389) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.