John Quiamas, DO
NPI 1023545712 · Family Medicine Physician · West Covina, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Quiamas, DO is a Family Medicine Physician provider in West Covina, CA (NPI 1023545712).
Provider details
- NPI number
- 1023545712
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- 5101025480 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
70 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 | 32 | $123 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 26 | $82 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 12 | $120 |
Typical Medicare-allowed amounts for these services range $82–$123 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$40 across 2 records (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
Additional practice locations (2)
- 33155 Annapolis StWayne, MI 48184-2405Phone: (734) 467-2482
- 455 Toll Gate RdWarwick, RI 02886-2759Phone: (401) 737-7000
Registry dates
- Enumerated
- 2017-05-12
- Last updated
- 2024-02-02
- Certified
- 2024-02-02
Frequently asked questions
- What is John Quiamas's NPI number?
- John Quiamas's National Provider Identifier (NPI) is 1023545712, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Quiamas's specialty?
- John Quiamas is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Quiamas located?
- John Quiamas's practice location on file with NPPES is 1135 S Sunset Ave Ste 401, West Covina, CA 91790-3921.
- What is John Quiamas's phone number?
- The practice phone number listed in the NPPES registry for John Quiamas is (626) 732-8390.
- Does John Quiamas accept Medicare?
- John Quiamas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Quiamas's NPI active?
- Yes — John Quiamas's NPI (1023545712) is active in the NPPES registry as of the last update on 2024-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.