NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1427147446 MD
Verify on CMS → Karen Johns, MD
Family Medicine Physician in Indianapolis, 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 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
11K
Medicare Part D claims · 634 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$76.79
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Karen Johns, MD filed 11,227 Medicare Part D claims in 2023 as a Family Medicine Physician in Indianapolis, Indiana, prescribing 89% generic.
- 11K
- Part D claims, 2023
- 89%
- generic prescribing
- $76.79
- industry payments (Sunshine Act)
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.
Karen Johns, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
11,227 Top 2% higher than 98% 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
◑
Board-eligible specialty (heuristic, not verified)
Karen Johns, 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 Karen Johns, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
11,227 228% vs specialty avg
Specialty distribution in Indiana
How Family Medicine Physician 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 Family Medicine Physician. 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).
Karen Johns, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 10421 E COUNTY ROAD 100 N, Indianapolis, IN, 46234, with a listed phone of (317) 272-7013. NPI 1427147446 was issued on 10/11/2006.
Medicare Part D records for calendar year 2023 show 11,227 prescription claims written by this provider, covering 634 Medicare beneficiaries and totaling roughly $680K in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 2.4%.
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
Provider Details
| NPI | 1427147446 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 10/11/2006 |
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 Karen Johns, MD. Source: openpaymentsdata.cms.gov.
Total received
$77
Largest payer
PFIZER INC.
Most common payment type
Food and Beverage
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
Karen Johns, MD - brand share 11.0%
Family Medicine Physician average
11% brand-name claims vs 89% generic, on 11,227 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.
11,227
Total Claims
$680K
Total Drug Cost
634
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 27,123
- Total Day Supply
- 791,459
- Brand vs Generic
- 11% brand / 89% generic
- Brand Drug Cost
- $450K
- Generic Drug Cost
- $227K
- Opioid Claims
- 271 (2.4% rate)
- Antibiotic Claims
- 384
Patient Demographics
- Average Patient Age
- 74.7 years
- Avg HCC Risk Score
- 1.13
- Gender Split
- 76% female / 24% male
- Age Distribution
- <65: 17, 65-74: 317, 75-84: 231, 85+: 69
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Karen Johns, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
561 claims
- Levothyroxine Sodium
Levothyroxine Sodium
517 claims
- Amlodipine Besylate
Amlodipine Besylate
385 claims
- Simvastatin
Simvastatin
329 claims
- Metformin Hcl Er
Metformin Hcl Er
315 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
306 claims
- Metoprolol Succinate
Metoprolol Succinate
280 claims
- Losartan Potassium
Losartan Potassium
268 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 561 |
| Levothyroxine Sodium | 517 |
| Amlodipine Besylate | 385 |
| Simvastatin | 329 |
| Metformin Hcl Er Metformin Hcl | 315 |
| Rosuvastatin Calcium | 306 |
| Metoprolol Succinate | 280 |
| Losartan Potassium | 268 |
| Lisinopril | 261 |
| Alendronate Sodium | 241 |
* 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 Karen Johns, 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
Karen Johns, MD's 11,227 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Johns.
Dr. Faryaal Aamir
MD
Boonville, IN
Dr. Troy Abbott
MD
Muncie, IN
Dr. Musa Abdalla
M. D.
Lagrange, IN
Dr. Azra Abdullah
M.D.
Indianapolis, IN
Dr. Daniel Abel
M.D.
Mishawaka, IN
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 Indiana 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.
Healthcare Guides
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How to Find a Doctor
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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 Karen Johns, MD's specialty? ▼
Karen Johns, MD specializes in Family Medicine Physician and practices in Indianapolis, Indiana. Credentials: MD.
How much does Karen Johns, MD prescribe under Medicare Part D? ▼
In 2023, Karen Johns, MD wrote 11,227 Medicare Part D claims totaling $680K in drug costs for 634 beneficiaries.
Where is Karen Johns, MD located? ▼
Karen Johns, MD is located at 10421 E COUNTY ROAD 100 N, Indianapolis, IN, 46234. Phone: (317) 272-7013.
What is Karen Johns, MD's NPI number? ▼
Karen Johns, MD's National Provider Identifier (NPI) is 1427147446, issued on 10/11/2006.
Does Karen Johns, MD prescribe more brand-name or generic drugs? ▼
Karen Johns, MD's prescribing is 11% brand-name and 89% generic drugs by claim count, with $450K in brand drug costs.
Does Karen Johns, MD prescribe opioids? ▼
Yes, Karen Johns, MD had 271 opioid claims in 2023 with an opioid prescribing rate of 2.4%.
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 Karen Johns, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Karen Johns, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Karen Johns, MD accept Medicare? ▼
Karen Johns, MD appears in CMS Medicare data with 11,227 Part D claims and 634 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karen Johns, MD's credentials? ▼
Karen Johns, MD's NPI is 1427147446 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
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.