Physician Profile
Unclaimed ProfileAbout JOHNS
Gregory J Johns, M.D. practises internal medicine in Phoenix, AZ. Gregory is a 1991 graduate of University of Nevada School of Medicine.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What is Dr. Johns's specialty?
Dr. Johns is an internal medicine in Phoenix, AZ. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where can I find Dr. Johns?
Dr. Johns is listed at 4400 N 32ND ST STE 200, Phoenix, AZ 85018. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Johns?
The number on file is (602) 522-1900. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Johns's NPI number?
Dr. Johns's National Provider Identifier is 1962443622. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Johns's medical education?
Dr. Johns attended University of Nevada School of Medicine, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Johns been practising?
Dr. Johns has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Johns known for?
According to Medicare billing data, Dr. Johns performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as x-ray of chest, 2 views; provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Johns confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Johns. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (602) 522-1900
- Email not available
Practice Locations
4400 N 32ND ST STE 200
Phoenix, AZ 85018
Procedures Most Often Billed to Medicare
13,244 services · 11,770 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
915 |
| X-ray of chest, 2 views | Imaging | 71046 |
599 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
513 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
153 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
952 |
| Blood test, comprehensive group of blood chemicals | Lab test | 80053 |
842 |
| Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | Lab test | 85025 |
769 |
| Urinalysis, manual test | Lab test | 81002 |
709 |
| Thyroxine (thyroid chemical), free | Lab test | 84439 |
690 |
| Blood test, thyroid stimulating hormone (tsh) | Lab test | 84443 |
689 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other internal medicines in Phoenix 8
Same specialty, same city.
Trained at University of Nevada School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1991 at University of Nevada School of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in AZ who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.