James Deer, MD
NPI 1952538027 · Endocrinology, Diabetes & Metabolism Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Deer, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Phoenix, AZ (NPI 1952538027).
Provider details
- NPI number
- 1952538027
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 47663 (AZ)
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
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
989 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 | 556 | $119 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 301 | $16 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 132 | $32 |
Typical Medicare-allowed amounts for these services range $16–$119 (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 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 343 | 92 |
| Semaglutidebrand: Ozempic | 145 | 36 |
| Metformin Hcl | 141 | 49 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 133 | 45 |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 132 | 51 |
| Levothyroxine Sodiumbrand: Synthroid | 107 | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,319 across 105 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
- 2009-06-16
- Last updated
- 2022-05-14
- Certified
- 2022-05-14
Frequently asked questions
- What is James Deer's NPI number?
- James Deer's National Provider Identifier (NPI) is 1952538027, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Deer's specialty?
- James Deer is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is James Deer located?
- James Deer's practice location on file with NPPES is 2222 E. Highland Ave, Phoenix, AZ 85016-4872.
- What is James Deer's phone number?
- The practice phone number listed in the NPPES registry for James Deer is (480) 665-9569.
- Does James Deer accept Medicare?
- James Deer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Deer's NPI active?
- Yes — James Deer's NPI (1952538027) is active in the NPPES registry as of the last update on 2022-05-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.