Grace Kumamoto, MD
NPI 1871578161 · Family Medicine Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grace Kumamoto, MD is a Family Medicine Physician provider in Riverside, CA (NPI 1871578161).
Provider details
- NPI number
- 1871578161
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A61411 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
688 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 201 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 163 | $132 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 151 | $133 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 147 | $20 |
| Administration of Influenza Virus VaccineG0008 | 14 | $33 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 139 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 718 | 208 |
| Atorvastatin Calcium | 675 | 212 |
| Losartan Potassium | 543 | 166 |
| Rosuvastatin Calcium | 456 | 144 |
| Lisinopril | 407 | 120 |
| Levothyroxine Sodium | 334 | 89 |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$120 across 5 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
Registry dates
- Enumerated
- 2005-12-09
- Last updated
- 2025-04-14
- Certified
- 2025-04-14
Frequently asked questions
- What is Grace Kumamoto's NPI number?
- Grace Kumamoto's National Provider Identifier (NPI) is 1871578161, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grace Kumamoto's specialty?
- Grace Kumamoto is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Grace Kumamoto located?
- Grace Kumamoto's practice location on file with NPPES is 6405 Day St, Riverside, CA 92507-0901.
- What is Grace Kumamoto's phone number?
- The practice phone number listed in the NPPES registry for Grace Kumamoto is (951) 697-5473.
- Does Grace Kumamoto accept Medicare?
- Grace Kumamoto is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grace Kumamoto's NPI active?
- Yes — Grace Kumamoto's NPI (1871578161) is active in the NPPES registry as of the last update on 2025-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.