Gregory Johns, M.D.
NPI 1962443622 · Internal Medicine Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Johns, M.D. is a Internal Medicine Physician provider in Phoenix, AZ (NPI 1962443622).
Provider details
- NPI number
- 1962443622
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 22763 (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
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
14,159 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 | 952 | $117 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 915 | $3 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 842 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 769 | $8 |
| Urinalysis, Manual Test81002 | 709 | $3 |
| Thyroxine (thyroid Chemical), Free84439 | 690 | $9 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 115 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 432 | 127 |
| Levothyroxine Sodium | 301 | 90 |
| Amlodipine Besylate | 261 | 77 |
| Losartan Potassium | 200 | 54 |
| Rosuvastatin Calcium | 184 | 62 |
| Lisinopril | 168 | 50 |
| Zolpidem Tartrate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,096 across 182 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
- 2006-06-10
- Last updated
- 2008-05-21
Frequently asked questions
- What is Gregory Johns's NPI number?
- Gregory Johns's National Provider Identifier (NPI) is 1962443622, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Johns's specialty?
- Gregory Johns is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Johns located?
- Gregory Johns's practice location on file with NPPES is 4400 N 32nd St Ste 200, Phoenix, AZ 85018-3965.
- What is Gregory Johns's phone number?
- The practice phone number listed in the NPPES registry for Gregory Johns is (602) 522-1900.
- Does Gregory Johns accept Medicare?
- Gregory Johns is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Johns's NPI active?
- Yes — Gregory Johns's NPI (1962443622) is active in the NPPES registry as of the last update on 2008-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.