2026 NPPES data Family Medicine Physician NPI 1508557901 MD
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Chandler Grier, MD

Family Medicine Physician in Midland, Michigan. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,640 in Family Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
194
Medicare Part D claims · 46 beneficiaries · Family Medicine Physician avg: 3K
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Chandler Grier, MD filed 194 Medicare Part D claims in 2023 as a Family Medicine Physician in Midland, Michigan.

194
Part D claims, 2023

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.

Chandler Grier, MD's Medicare Part D volume vs every U.S. prescriber

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

194 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. 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-eligible specialty (heuristic, not verified)

Chandler Grier, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Chandler Grier, MD?

Quality data not reported

NPI registry status

Active

Issued 05/17/2023

NPI 1508557901

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

194 94% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Michigan

How Family Medicine Physician compares to other specialties among Michigan providers

Michigan providers

Largest specialties in Michigan (% of in-state providers)

Behavior Technician - 21.4%Behavior Technician21.4%Clinical Social Worker - 5.8%Clinical Social Worker5.8%Student in an Organized Health Care Education/Training Program - 3.6%Student in an Organized Health Care Education/Training Program3.6%Physical Therapist - 3.4%Physical Therapist3.4%Social Worker - 3.4%Social Worker3.4%Pharmacist - 3%Pharmacist3%Family Medicine Physician - 2.1%Family Medicine Physician2.1%
Largest specialties in Michigan (% of in-state providers)

Board certification

Not published by CMS

CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Family Medicine Physician. Verify directly:

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).

Chandler Grier, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 4611 CAMPUS RIDGE DR, Midland, MI, 48640, with a listed phone of (989) 839-3320. NPI 1508557901 was issued on 05/17/2023. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Grier 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 194 prescription claims written by this provider, covering 46 Medicare beneficiaries and totaling roughly $14K in drug spend. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

4611 CAMPUS RIDGE DR
Midland, MI 48640

Provider Details

NPI 1508557901
Specialty Family Medicine Physician
Credentials MD
Gender Male
NPI Issued 05/17/2023

License & disciplinary context - Michigan MI-BOM 2023 annual report

Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~41K Michigan medical licensees in 2023 - they are NOT specific to Chandler Grier, MD. To verify Chandler Grier, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases

MI-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

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

194
Total Claims
$14K
Total Drug Cost
46
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
386
Total Day Supply
10,789
Generic Drug Cost
$2K
Antibiotic Claims
13

Patient Demographics

Average Patient Age
72.0 years
Avg HCC Risk Score
1.65
Gender Split
50% female / 50% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
17

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

Family Medicine Physician Overview

How Chandler Grier, MD fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

Chandler Grier, MD's 194 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Michigan

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Michigan medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Family Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Chandler Grier, MD's specialty?
Chandler Grier, MD specializes in Family Medicine Physician and practices in Midland, Michigan. Credentials: MD.
How much does Chandler Grier, MD prescribe under Medicare Part D?
In 2023, Chandler Grier, MD wrote 194 Medicare Part D claims totaling $14K in drug costs for 46 beneficiaries.
Where is Chandler Grier, MD located?
Chandler Grier, MD is located at 4611 CAMPUS RIDGE DR, Midland, MI, 48640. Phone: (989) 839-3320.
What is Chandler Grier, MD's NPI number?
Chandler Grier, MD's National Provider Identifier (NPI) is 1508557901, issued on 05/17/2023.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Chandler Grier, MD prescribe most often?
Based on 2023 Medicare Part D data, Chandler Grier, MD's most frequently prescribed drugs include Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Chandler Grier, MD accept Medicare?
Chandler Grier, MD appears in CMS Medicare data with 194 Part D claims and 46 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chandler Grier, MD's credentials?
Chandler Grier, MD's NPI is 1508557901 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

Compiled from official public sources by the PlainDoctor editorial team.