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Dr. Nancy L Greer , MD

Pediatrics • Phoenix, AZ

Active NPI 1639158363 Individual Practitioner Female Practitioner
Practice location in NPPES

20040 N 19th Ave Ste C
Phoenix, AZ 850274256

Call 6238698948 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

20040 N 19th Ave Ste C

Phoenix, AZ 850274256

Telephone 6238698948
Organization at the Same NPPES Address or Phone
Twin Pediatrics, P.c. Facility NPI 1568675908

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Industry payments (Open Payments)

Fewer than 11 payment records totaling $19.48 in 2024

Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.

These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.

General: payments not tied to research, such as meals, travel, consulting or speaking fees.

A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.

Source: CMS Open Payments, program year 2024.

Guide: How to read an Open Payments record

NPI first issued

2006

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Medicare assignment not listed

CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Compared with the same specialty in Phoenix and Arizona

422 active clinicians are listed under Pediatrics with a practice address in Phoenix, AZ (1,310 in Arizona).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Phoenix

0.2% of these 422 clinicians have the CMS telehealth indicator.

6.4% of these 422 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments · Program Year 2024
Disclosure Year:

Program year 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $19.48.

Manufacturer Payment Nature Product Type Amount ($)
Sanofi Pasteur Inc.
Food and Beverage
In-kind items and services
MENQUADFI General $19.48

Source: CMS Open Payments, program year 2024, released June 30, 2026.

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2026-04-10
Pediatrics Primary Specialty

NUCC Taxonomy Code: 208000000X

License # reported to NPPES AZ 66843

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Arizona Medical Board.
Look Up on State Board Site

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid ID
218431 (AZ)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

9 Historical Events
📍
Updated Practice Location April 10, 2026

Registered at 20040 N 19TH AVE STE C, PHOENIX, AZ 850274256 (Tel: 6238698948)

📍
Updated Business Mailing Address April 10, 2026

Registered at 20040 N 19TH AVE STE C, PHOENIX, AZ 850274256 (Tel: 6238698948)

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) April 10, 2026

Pediatrics (license number reported to NPPES: AZ 66843)

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NPI Profile Active December 30, 2008

NPI status registered as active in NPPES database

📍
Practice Location (Initial Record) December 30, 2008

Registered at 3301 W 144TH AVE, STE 200, BROOMFIELD, CO 80023 (Tel: 3034385522)

📍
Business Mailing Address (Initial Record) December 30, 2008

Registered at 3301 W 144TH AVE, STE. 200, BROOMFIELD, CO 80023 (Tel: 3034695843)

👤
Provider Name / Credentials (Initial Record) December 30, 2008

Recorded as NANCY GREER, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) December 30, 2008

Pediatrics (license number reported to NPPES: CO 35049)

🟢
Initial NPI Registration & Enumeration January 11, 2006

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1639158363
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: January 11, 2006
Last Update: April 10, 2026
Sole Proprietor: Yes

Other Pediatrics Specialists in Phoenix

All Pediatrics Specialists in Phoenix

Mailing Address

20040 N 19th Ave Ste C

Phoenix, AZ 850274256

Phone: 6238698948

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.