John Farley, M.D.
NPI 1427034578 · Gynecologic Oncology Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Gynecological Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Farley, M.D. is a Gynecologic Oncology Physician provider in Phoenix, AZ (NPI 1427034578).
Provider details
- NPI number
- 1427034578
- Entity type
- Individual
- Primary specialty
- Gynecologic Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 44143 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
233 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 | 97 | $92 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 71 | $90 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 25 | $62 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 23 | $135 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 17 | $124 |
Typical Medicare-allowed amounts for these services range $62–$135 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 46 | — |
| Ondansetronbrand: Ondansetron Odt | 25 | 14 |
| Dexamethasone | 18 | 11 |
| Gabapentin | 16 | — |
| Olaparibbrand: Lynparza | 16 | — |
| Potassium Chloride | 14 | — |
| Prochlorperazine Maleate | 14 | 12 |
| Niraparib Tosylate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$11,626 across 10 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
Additional practice locations (1)
- 10214 N Tatum Blvd Ste A600Phoenix, AZ 85028-4247Phone: (602) 406-1530Fax: (602) 406-1539
Registry dates
- Enumerated
- 2005-12-21
- Last updated
- 2024-12-05
- Certified
- 2024-12-05
Frequently asked questions
- What is John Farley's NPI number?
- John Farley's National Provider Identifier (NPI) is 1427034578, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Farley's specialty?
- John Farley is listed in the NPPES registry with a primary specialty of Gynecologic Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Farley located?
- John Farley's practice location on file with NPPES is 625 N 6th St, Phoenix, AZ 85004-2155.
- What is John Farley's phone number?
- The practice phone number listed in the NPPES registry for John Farley is (602) 406-8222.
- Does John Farley accept Medicare?
- John Farley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Farley's NPI active?
- Yes — John Farley's NPI (1427034578) is active in the NPPES registry as of the last update on 2024-12-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.