Michael Duffy, M.D.
NPI 1689635328 · Specialist · Beverly Hills, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Duffy, M.D. is a Specialist provider in Beverly Hills, CA (NPI 1689635328).
Provider details
- NPI number
- 1689635328
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- License
- G59599 (CA)
Specialties & taxonomies
Other Service Providers
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
1,665 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 252 | $129 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 159 | $181 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 141 | $92 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 130 | $15 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 111 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 317 | 83 |
| Levothyroxine Sodium | 112 | 29 |
| Rosuvastatin Calcium | 103 | 35 |
| Amlodipine Besylate | 97 | 31 |
| Olmesartan Medoxomil | 87 | 23 |
| Apixabanbrand: Eliquis | 77 | 15 |
| Temazepam |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,100 across 48 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
- 2006-03-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is Michael Duffy's NPI number?
- Michael Duffy's National Provider Identifier (NPI) is 1689635328, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Duffy's specialty?
- Michael Duffy is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Michael Duffy located?
- Michael Duffy's practice location on file with NPPES is 9400 Brighton Way, Beverly Hills, CA 90210-4714.
- What is Michael Duffy's phone number?
- The practice phone number listed in the NPPES registry for Michael Duffy is (310) 271-6229.
- Does Michael Duffy accept Medicare?
- Michael Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Duffy's NPI active?
- Yes — Michael Duffy's NPI (1689635328) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.