Gregory Grunwald, DO
NPI 1215998679 · Internal Medicine Physician · Medford, OR
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Grunwald, DO is a Internal Medicine Physician provider in Medford, OR (NPI 1215998679).
Provider details
- NPI number
- 1215998679
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- DO22277 (OR)
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
526 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 | 205 | $88 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 168 | $124 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 75 | $123 |
| Testing for Presence of Drug, Read By Direct Observation80305 | 67 | $12 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 11 | $160 |
Typical Medicare-allowed amounts for these services range $12–$160 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 111 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 437 | 143 |
| Lisinopril | 326 | 95 |
| Levothyroxine Sodium | 227 | 66 |
| Omeprazole | 197 | 64 |
| Amlodipine Besylate | 195 | 54 |
| Metformin Hcl | 195 | 62 |
| Hydrochlorothiazide | 173 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19 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
- 2006-03-28
- Last updated
- 2010-09-23
Frequently asked questions
- What is Gregory Grunwald's NPI number?
- Gregory Grunwald's National Provider Identifier (NPI) is 1215998679, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Grunwald's specialty?
- Gregory Grunwald is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Grunwald located?
- Gregory Grunwald's practice location on file with NPPES is 2380 W Main St Ste a, Medford, OR 97501-2390.
- What is Gregory Grunwald's phone number?
- The practice phone number listed in the NPPES registry for Gregory Grunwald is (541) 858-7183.
- Does Gregory Grunwald accept Medicare?
- Gregory Grunwald is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Grunwald's NPI active?
- Yes — Gregory Grunwald's NPI (1215998679) is active in the NPPES registry as of the last update on 2010-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.