Karisa Jahn, D.O.
NPI 1346531027 · Geriatric Medicine (Family Medicine) Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Geriatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karisa Jahn, D.O. is a Geriatric Medicine (Family Medicine) Physician provider in Fontana, CA (NPI 1346531027).
Provider details
- NPI number
- 1346531027
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- A11079 (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
15 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 115 | 46 |
| Hydromorphone Hcl | 78 | 34 |
| Ondansetron Hcl | 64 | 25 |
| Fentanyl | 57 | 14 |
| Morphine Sulfatebrand: Morphine Sulfate Er | 46 | 11 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 40 | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-04-28
- Last updated
- 2021-12-03
Frequently asked questions
- What is Karisa Jahn's NPI number?
- Karisa Jahn's National Provider Identifier (NPI) is 1346531027, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karisa Jahn's specialty?
- Karisa Jahn is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Karisa Jahn located?
- Karisa Jahn's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Karisa Jahn's phone number?
- The practice phone number listed in the NPPES registry for Karisa Jahn is (909) 609-3500.
- Does Karisa Jahn accept Medicare?
- Karisa Jahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karisa Jahn's NPI active?
- Yes — Karisa Jahn's NPI (1346531027) is active in the NPPES registry as of the last update on 2021-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.