2026 NPPES data Pediatrics Physician NPI 1336191287 MD
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MICHAEL GREENFIELD, MD

Pediatrics Physician in OVERLAND PARK, Kansas. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
5K
Medicare Part D claims · 330 beneficiaries · Pediatrics Physician avg: 762
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$25.65
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

MICHAEL GREENFIELD, MD filed 4,562 Medicare Part D claims in 2023 as a Pediatrics Physician in OVERLAND PARK, Kansas, prescribing 89% generic.

5K
Part D claims, 2023
89%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

MICHAEL GREENFIELD, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

4,562 Top 7% higher than 93% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

MICHAEL GREENFIELD, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about MICHAEL GREENFIELD, MD?

Quality data not reported

NPI registry status

Active

Issued 05/17/2006

NPI 1336191287

Primary specialty

Pediatrics Physician

High-volume

80,574 US NPIs in this specialty

Medicare Part D claims

4,562 499% vs specialty avg

2023 prescription claims

Specialty avg: 762

Specialty distribution in Kansas

How Pediatrics Physician compares to other specialties among Kansas providers

Kansas providers

Pediatrics Physician share within Kansas

1. Pediatrics Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pediatrics Physician share within Kansas

Specialty board-certification context

Estimated specialty board-certified rate — Pediatrics Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pediatrics Physician ABMS/AOA estimate

Est. board-certified rate (Pediatrics Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pediatrics Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

MICHAEL GREENFIELD, MD appears in the CMS NPPES registry as a Pediatrics Physician provider holding MD credentials at 7840 W 165TH ST STE 210, OVERLAND PARK, KS, 66223, with a listed phone of (913) 373-2230. NPI 1336191287 was issued on 05/17/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GREENFIELD most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 4,562 prescription claims written by this provider, covering 330 Medicare beneficiaries and totaling roughly $317K in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 1.1%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Pediatrics Physician is a high-volume specialty nationwide, with 80,574 enrolled providers across 56 states and an average of 762 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

7840 W 165TH ST STE 210
OVERLAND PARK, KS 66223

Provider Details

NPI 1336191287
Specialty Pediatrics Physician
Credentials MD
Gender Male
NPI Issued 05/17/2006

Hospital and facility affiliations

Facilities where MICHAEL GREENFIELD, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

SHAWNEE MISSION MEDICAL CENTER INC
MERRIAM, KS

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for MICHAEL GREENFIELD, MD. Source: openpaymentsdata.cms.gov.

Total received

$26

Largest payer

Takeda Pharmaceuticals U.S.A., Inc.

Most common payment type

Education

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

MICHAEL GREENFIELD, MD — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 4,562 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

4,562
Total Claims
$317K
Total Drug Cost
330
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
9,992
Total Day Supply
294,105
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$254K
Generic Drug Cost
$63K
Opioid Claims
51 (1.1% rate)
Antibiotic Claims
51

Patient Demographics

Average Patient Age
74.0 years
Avg HCC Risk Score
0.96
Gender Split
40% female / 60% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What MICHAEL GREENFIELD, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
449
Levothyroxine Sodium
343
Lisinopril
198
Rosuvastatin Calcium
171
Losartan Potassium
163
Amlodipine Besylate
159
Meloxicam
130
Pantoprazole Sodium
119
Metformin Hcl
110
Tamsulosin Hcl
99

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Pediatrics Physician Overview

How MICHAEL GREENFIELD, MD fits within the Pediatrics Physician landscape nationally.

80,574
Pediatrics Physician Providers in US
56
States with Pediatrics Physician
762
Avg Claims per Provider

MICHAEL GREENFIELD, MD's 4,562 claims are above the specialty average of 762.

Nearby Pediatrics Physician Providers in Kansas

Other clinicians with the same primary specialty enrolled in Kansas, drawn from the same CMS NPPES roster as GREENFIELD.

Compare Pediatrics Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MICHAEL GREENFIELD, MD's specialty?
MICHAEL GREENFIELD, MD specializes in Pediatrics Physician and practices in OVERLAND PARK, Kansas. Credentials: MD.
How much does MICHAEL GREENFIELD, MD prescribe under Medicare Part D?
In 2023, MICHAEL GREENFIELD, MD wrote 4,562 Medicare Part D claims totaling $317K in drug costs for 330 beneficiaries.
Where is MICHAEL GREENFIELD, MD located?
MICHAEL GREENFIELD, MD is located at 7840 W 165TH ST STE 210, OVERLAND PARK, KS, 66223. Phone: (913) 373-2230.
What is MICHAEL GREENFIELD, MD's NPI number?
MICHAEL GREENFIELD, MD's National Provider Identifier (NPI) is 1336191287, issued on 05/17/2006.
Does MICHAEL GREENFIELD, MD prescribe more brand-name or generic drugs?
MICHAEL GREENFIELD, MD's prescribing is 11% brand-name and 89% generic drugs by claim count, with $254K in brand drug costs.
Does MICHAEL GREENFIELD, MD prescribe opioids?
Yes, MICHAEL GREENFIELD, MD had 51 opioid claims in 2023 with an opioid prescribing rate of 1.1%.
How many Pediatrics Physician providers are there in the US?
There are 80,574 Pediatrics Physician providers across 56 states in the US. The average Pediatrics Physician provider writes 762 Medicare Part D claims per year.
What drugs does MICHAEL GREENFIELD, MD prescribe most often?
Based on 2023 Medicare Part D data, MICHAEL GREENFIELD, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MICHAEL GREENFIELD, MD accept Medicare?
MICHAEL GREENFIELD, MD appears in CMS Medicare data with 4,562 Part D claims and 330 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MICHAEL GREENFIELD, MD's credentials?
MICHAEL GREENFIELD, MD's NPI is 1336191287 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology