NPI registry status
Active
2026 NPPES data Addiction Medicine (Family Medicine) Physician NPI 1255004313 FNP-C
Verify on CMS → Janna Johnson, FNP-C
Addiction Medicine (Family Medicine) Physician in Charlestown, 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 799 in Addiction Medicine (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
643
Medicare Part D claims · 33 beneficiaries · Addiction Medicine (Family Medicine) Physician avg: 1K
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Janna Johnson, FNP-C filed 643 Medicare Part D claims in 2024 as an Addiction Medicine (Family Medicine) Physician in Charlestown, Indiana, prescribing 98% generic.
- 643
- Part D claims, 2024
- 98%
- generic prescribing
- ≥68th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Janna Johnson, FNP-C
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1255004313), first enumerated 07/26/2021.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 643 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Johnson with other Addiction Medicine (Family Medicine) Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 2 Addiction Medicine (Family Medicine) Physician providers in Charlestown, IN →
Also enrolled in Indiana
- Dr. Rene Alonzo, MD Goshen, IN
- Dr. Maria Bajuyo, MD Greenwood, IN
- Dr. William Cooke, M.D. Austin, IN
- Dr. Timothy Davis, M.D. Elkhart, IN
- Dr. Peter Farr, M.D. Fishers, IN
- Dr. Lynn Faur, MD Fort Wayne, IN
Other specialties in Charlestown: Addiction (Substance Use Disorder) Counselor (64) · Licensed Practical Nurse (26) · Pharmacist (16) · Physical Therapist (13)
CMS NPPES provider registry desk
NPI 1255004313 · Addiction Medicine (Family Medicine) Physician
NPI-10 · ENUM-RECENT · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1255004313
- ENUM-RECENT 2021
- TAX-NARROW 799
- RX-LIGHT 643
- BOOK-THIN 27 in Indiana
- PHOTO-ENUM Nicole Schachman, NP · 2021
Janna Johnson, FNP-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
643 ≥ 68th percentile 68% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Janna Johnson, FNP-C 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 Janna Johnson, FNP-C?
Quality data not reportedPrimary specialty
Addiction Medicine (Family Medicine) Physician
Medicare Part D claims
643 46% vs specialty avg
Specialty distribution in Indiana
How Addiction Medicine (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 Addiction Medicine (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).
Practice Address
Provider Details
| NPI | 1255004313 |
|---|---|
| Specialty | Addiction Medicine (Family Medicine) Physician |
| Credentials | FNP-C |
| Gender | Female |
| NPI Issued | 07/26/2021 |
Brand vs generic prescribing mix · Generic-heavy
Janna Johnson, FNP-C - brand share 2.0%
Addiction Medicine (Family Medicine) Physician average
2% brand-name claims vs 98% generic, on 643 2024 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 2024.
643
Total Claims
$30K
Total Drug Cost
33
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 648.2
- Total Day Supply
- 9,380
- Brand vs Generic
- 2% brand / 98% generic
- Brand Drug Cost
- $12K
- Generic Drug Cost
- $18K
Patient Demographics
- Average Patient Age
- 54.4 years
- Avg HCC Risk Score
- 1.51
- Gender Split
- 39% female / 61% male
- Age Distribution
- <65: 21, 65-74: 12, 75-84: 0, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Janna Johnson, FNP-C prescribes most
Top Medicare Part D drugs by claim count, 2024
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
215 claims
- Gabapentin
Gabapentin
133 claims
- Ondansetron Hcl 24
Ondansetron Hcl
24 claims
- Clonidine Hcl 22
Clonidine Hcl
22 claims
- Trazodone Hcl 22
Trazodone Hcl
22 claims
- Cyclobenzaprine Hcl 19
Cyclobenzaprine Hcl
19 claims
- Lisinopril 19
Lisinopril
19 claims
- Buspirone Hcl 14
Buspirone Hcl
14 claims
| Drug | Claims |
|---|---|
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 215 |
| Gabapentin | 133 |
| Ondansetron Hcl | 24 |
| Clonidine Hcl | 22 |
| Trazodone Hcl | 22 |
| Cyclobenzaprine Hcl | 19 |
| Lisinopril | 19 |
| Buspirone Hcl | 14 |
| Escitalopram Oxalate | 12 |
| Ibuprofen | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Addiction Medicine (Family Medicine) Physician in IN →
All providers in Indiana →
Compare specialties →
Addiction Medicine (Family Medicine) Physician Overview
How Janna Johnson, FNP-C fits within the Addiction Medicine (Family Medicine) Physician landscape nationally.
799
Addiction Medicine (Family Medicine) Physician Providers in US
49
States with Addiction Medicine (Family Medicine) Physician
1,187
Avg Claims per Provider
Janna Johnson, FNP-C's 643 claims are below the specialty average of 1,187.
Nationwide Addiction Medicine (Family Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Johnson, both outside Indiana so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2021)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Addiction Medicine (Family Medicine) Physician Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Johnson.
One of 27 Addiction Medicine (Family Medicine) Physician providers enrolled in Indiana, 11 are shown on this page.
Carolyn Fegenbush
ARNP
Jeffersonville, IN
Dr. Zeenat Habibullah
MD
Fort Wayne, IN
Dr. Daniel Heard
DO
Evansville, IN
Dr. Gretchen Johnson
DO
Indianapolis, IN
Dr. Jasser Khairallah
DO
Indianapolis, IN
Compare Addiction Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Janna Johnson, FNP-C's specialty? ▼
Janna Johnson, FNP-C specializes in Addiction Medicine (Family Medicine) Physician and practices in Charlestown, Indiana. Credentials: FNP-C.
How much does Janna Johnson, FNP-C prescribe under Medicare Part D? ▼
In 2024, Janna Johnson, FNP-C wrote 643 Medicare Part D claims totaling $30K in drug costs for 33 beneficiaries.
Where is Janna Johnson, FNP-C located? ▼
Janna Johnson, FNP-C is located at 2100 MARKET ST, Charlestown, IN, 47111. Phone: (812) 503-5100.
What is Janna Johnson, FNP-C's NPI number? ▼
Janna Johnson, FNP-C's National Provider Identifier (NPI) is 1255004313, issued on 07/26/2021.
Does Janna Johnson, FNP-C prescribe more brand-name or generic drugs? ▼
Janna Johnson, FNP-C's prescribing is 2% brand-name and 98% generic drugs by claim count, with $12K in brand drug costs.
How many Addiction Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 799 Addiction Medicine (Family Medicine) Physician providers across 49 states in the US. The average Addiction Medicine (Family Medicine) Physician provider writes 1,187 Medicare Part D claims per year.
What drugs does Janna Johnson, FNP-C prescribe most often? ▼
Based on 2024 Medicare Part D data, Janna Johnson, FNP-C's most frequently prescribed drugs include Buprenorphine-Naloxone, Gabapentin, Ondansetron Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Janna Johnson, FNP-C accept Medicare? ▼
Janna Johnson, FNP-C appears in CMS Medicare data with 643 Part D claims and 33 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Janna Johnson, FNP-C's credentials? ▼
Janna Johnson, FNP-C's NPI is 1255004313 with credentials FNP-C. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.