NPI registry status
Active
2026 NPPES data Periodontics NPI 1194749309 DDS, MSD
Verify on CMS → John Greif, DDS, MSD
Periodontics in Evansville, Indiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,062 in Periodontics, 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
283
Medicare Part D claims · 151 beneficiaries · Periodontics avg: 264
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
John Greif, DDS, MSD filed 283 Medicare Part D claims in 2023 as a Periodontics in Evansville, Indiana.
- 283
- 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.
John Greif, DDS, MSD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
283 49th percentile higher than 49% of 1,370,886 prescribers
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
What does the federal data show about John Greif, DDS, MSD?
Quality data not reportedPrimary specialty
Periodontics
Medicare Part D claims
283 7% vs specialty avg
Specialty distribution in Indiana
How Periodontics compares to other specialties among Indiana 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 Periodontics. Verify directly:
How MIPS and board certification work
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).
John Greif, DDS, MSD appears in the CMS NPPES registry as a Periodontics provider holding DDS, MSD credentials at 1212 PROFESSIONAL BLVD, Evansville, IN, 47714, with a listed phone of (812) 477-6112. NPI 1194749309 was issued on 07/27/2006.
Medicare Part D records for calendar year 2023 show 283 prescription claims written by this provider, covering 151 Medicare beneficiaries and totaling roughly $2K in drug spend.
Periodontics is a mid-sized specialty nationwide, with 6,062 enrolled providers across 53 states and an average of 264 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
Provider Details
| NPI | 1194749309 |
|---|---|
| Specialty | Periodontics |
| Credentials | DDS, MSD |
| Gender | Male |
| NPI Issued | 07/27/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
283
Total Claims
$2K
Total Drug Cost
151
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 287
- Total Day Supply
- 2,458
- Generic Drug Cost
- $1K
- Antibiotic Claims
- 218
Patient Demographics
- Average Patient Age
- 75.0 years
- Avg HCC Risk Score
- 0.86
- Gender Split
- 66% female / 34% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Greif, DDS, MSD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amoxicillin
Amoxicillin
159 claims
- Chlorhexidine Gluc… 32
Chlorhexidine Gluconate
32 claims
- Metronidazole 24
Metronidazole
24 claims
- Clindamycin Hcl 22
Clindamycin Hcl
22 claims
| Drug | Claims |
|---|---|
| Amoxicillin | 159 |
| Chlorhexidine Gluconate | 32 |
| Metronidazole | 24 |
| Clindamycin Hcl | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Periodontics Overview
How John Greif, DDS, MSD fits within the Periodontics landscape nationally.
6,062
Periodontics Providers in US
53
States with Periodontics
264
Avg Claims per Provider
John Greif, DDS, MSD's 283 claims are above the specialty average of 264.
Nearby Periodontics Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Greif.
Dr. David Alexander
D.D.S, M.S.D
Lafayette, IN
Hawra Alqallaf
Indianapolis, IN
Dr. Oluseyi Ayangade
D.D.S, M.S
Michigan City, IN
Dr. Clark Barco
D.D.S.
Indianapolis, IN
Dr. Chandni Batra
BDS, MDS, MSD
Indianapolis, IN
Compare Periodontics 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 Indiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Periodontics 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.
Healthcare Guides
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How to Find a Doctor
Step-by-step guide to choosing a provider
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Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Indiana
Frequently Asked Questions
What is John Greif, DDS, MSD's specialty? ▼
John Greif, DDS, MSD specializes in Periodontics and practices in Evansville, Indiana. Credentials: DDS, MSD.
How much does John Greif, DDS, MSD prescribe under Medicare Part D? ▼
In 2023, John Greif, DDS, MSD wrote 283 Medicare Part D claims totaling $2K in drug costs for 151 beneficiaries.
Where is John Greif, DDS, MSD located? ▼
John Greif, DDS, MSD is located at 1212 PROFESSIONAL BLVD, Evansville, IN, 47714. Phone: (812) 477-6112.
What is John Greif, DDS, MSD's NPI number? ▼
John Greif, DDS, MSD's National Provider Identifier (NPI) is 1194749309, issued on 07/27/2006.
How many Periodontics providers are there in the US? ▼
There are 6,062 Periodontics providers across 53 states in the US. The average Periodontics provider writes 264 Medicare Part D claims per year.
What drugs does John Greif, DDS, MSD prescribe most often? ▼
Based on 2023 Medicare Part D data, John Greif, DDS, MSD's most frequently prescribed drugs include Amoxicillin, Chlorhexidine Gluconate, Metronidazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Greif, DDS, MSD accept Medicare? ▼
John Greif, DDS, MSD appears in CMS Medicare data with 283 Part D claims and 151 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Greif, DDS, MSD's credentials? ▼
John Greif, DDS, MSD's NPI is 1194749309 with credentials DDS, MSD. 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
View source datasets and methodology notes
- 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.