Christopher Richardson, D.O.
NPI 1821418468 · Critical Care Medicine (Internal Medicine) Physician · Riverdale, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Richardson, D.O. is a Critical Care Medicine (Internal Medicine) Physician provider in Riverdale, CA (NPI 1821418468).
Provider details
- NPI number
- 1821418468
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- DO.2784 (AL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
174 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 138 | $195 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 36 | $72 |
Typical Medicare-allowed amounts for these services range $72–$195 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 559 W Washington StBurns, OR 97720-1441Phone: (541) 573-2074
Registry dates
- Enumerated
- 2014-04-22
- Last updated
- 2025-09-03
- Certified
- 2025-09-03
Frequently asked questions
- What is Christopher Richardson's NPI number?
- Christopher Richardson's National Provider Identifier (NPI) is 1821418468, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Richardson's specialty?
- Christopher Richardson is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Richardson located?
- Christopher Richardson's practice location on file with NPPES is 3567 W Mount Whitney Ave, Riverdale, CA 93656.
- What is Christopher Richardson's phone number?
- The practice phone number listed in the NPPES registry for Christopher Richardson is (559) 867-7200.
- Does Christopher Richardson accept Medicare?
- Christopher Richardson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Richardson's NPI active?
- Yes — Christopher Richardson's NPI (1821418468) is active in the NPPES registry as of the last update on 2025-09-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.