Ronald Ray Guzman, MD
NPI 1205061595 · Hospitalist Physician · Roseville, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Ray Guzman, MD is a Hospitalist Physician provider in Roseville, CA (NPI 1205061595).
Provider details
- NPI number
- 1205061595
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301093716 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
873 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 587 | $120 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 199 | $117 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 40 | $176 |
| Critical Care, First 30-74 Minutes99291 | 31 | $213 |
| Advance Care Planning, First 30 Minutes99497 | 16 | $77 |
Typical Medicare-allowed amounts for these services range $77–$213 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefdinir | 35 | 35 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 17 | 16 |
| Metoprolol Tartrate | 16 | 16 |
| Apixabanbrand: Eliquis | 15 | 14 |
| Pantoprazole Sodium | 15 | — |
| Prednisone | 15 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$120 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-05-15
- Last updated
- 2018-09-07
Frequently asked questions
- What is Ronald Ray Guzman's NPI number?
- Ronald Ray Guzman's National Provider Identifier (NPI) is 1205061595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Ray Guzman's specialty?
- Ronald Ray Guzman is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Ray Guzman located?
- Ronald Ray Guzman's practice location on file with NPPES is 1 Medical Plaza Dr, Roseville, CA 95661.
- What is Ronald Ray Guzman's phone number?
- The practice phone number listed in the NPPES registry for Ronald Ray Guzman is (916) 781-1927.
- Does Ronald Ray Guzman accept Medicare?
- Ronald Ray Guzman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Ray Guzman's NPI active?
- Yes — Ronald Ray Guzman's NPI (1205061595) is active in the NPPES registry as of the last update on 2018-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.