NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1144271461 M.D.
Verify on CMS → Janice Johnston, M.D.
Family Medicine Physician in Phoenix, Arizona.
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
3K
Medicare Part D claims · 767 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$117.07
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
Janice Johnston, M.D. filed 3,173 Medicare Part D claims in 2023 as a Family Medicine Physician in Phoenix, Arizona, prescribing 88% generic.
- 3K
- Part D claims, 2023
- 88%
- generic prescribing
- $117.07
- 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.
Janice Johnston, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,173 Top 11% higher than 89% 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)
Janice Johnston, M.D. 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 Janice Johnston, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
3,173 7% vs specialty avg
Specialty distribution in Arizona
How Family Medicine Physician compares to other specialties among Arizona 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).
Janice Johnston, M.D. appears in the CMS NPPES registry as a Family Medicine Physician provider holding M.D. credentials at 2020 N CENTRAL AVE STE 400, Phoenix, AZ, 85004, with a listed phone of (888) 407-7928. NPI 1144271461 was issued on 05/12/2006.
Medicare Part D records for calendar year 2023 show 3,173 prescription claims written by this provider, covering 767 Medicare beneficiaries and totaling roughly $194K in drug spend, split 11% brand-name and 88% generic by claim count.
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 | 1144271461 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 05/12/2006 |
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 Janice Johnston, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$117
Largest payer
ABBVIE 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
Janice Johnston, M.D. - brand share 11.0%
Family Medicine Physician average
11% brand-name claims vs 88% generic, on 3,173 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.
3,173
Total Claims
$194K
Total Drug Cost
767
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,122
- Total Day Supply
- 240,734
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $146K
- Generic Drug Cost
- $48K
- Antibiotic Claims
- 37
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 1.22
- Gender Split
- 65% female / 35% male
- Age Distribution
- <65: 66, 65-74: 414, 75-84: 236, 85+: 51
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Janice Johnston, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
286 claims
- Atorvastatin Calcium
Atorvastatin Calcium
259 claims
- Lisinopril
Lisinopril
174 claims
- Amlodipine Besylate
Amlodipine Besylate
163 claims
- Losartan Potassium
Losartan Potassium
140 claims
- Metformin Hcl
Metformin Hcl
123 claims
- Simvastatin 108
Simvastatin
108 claims
- Omeprazole 105
Omeprazole
105 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 286 |
| Atorvastatin Calcium | 259 |
| Lisinopril | 174 |
| Amlodipine Besylate | 163 |
| Losartan Potassium | 140 |
| Metformin Hcl | 123 |
| Simvastatin | 108 |
| Omeprazole | 105 |
| Rosuvastatin Calcium | 81 |
| Hydrochlorothiazide | 75 |
* 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 Janice Johnston, M.D. 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
Janice Johnston, M.D.'s 3,173 claims are below the specialty average of 3,418.
Nearby Family Medicine Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Johnston.
Dr. Muhammad Aamer
M.D.
Yuma, AZ
Dr. Ndidi Abara
M.D.
Yuma, AZ
Dr. Steven Abdelmalak
MD
Scottsdale, AZ
Dr. Lindsey Abeyta
FNP
Tucson, AZ
Dr. Modupeola Abiodun
M.D.
Chandler, AZ
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 Arizona 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.
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Medical Specialties Explained
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How insurance networks affect your costs
Telehealth Guide
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Frequently Asked Questions
What is Janice Johnston, M.D.'s specialty? ▼
Janice Johnston, M.D. specializes in Family Medicine Physician and practices in Phoenix, Arizona. Credentials: M.D..
How much does Janice Johnston, M.D. prescribe under Medicare Part D? ▼
In 2023, Janice Johnston, M.D. wrote 3,173 Medicare Part D claims totaling $194K in drug costs for 767 beneficiaries.
Where is Janice Johnston, M.D. located? ▼
Janice Johnston, M.D. is located at 2020 N CENTRAL AVE STE 400, Phoenix, AZ, 85004. Phone: (888) 407-7928.
What is Janice Johnston, M.D.'s NPI number? ▼
Janice Johnston, M.D.'s National Provider Identifier (NPI) is 1144271461, issued on 05/12/2006.
Does Janice Johnston, M.D. prescribe more brand-name or generic drugs? ▼
Janice Johnston, M.D.'s prescribing is 11% brand-name and 88% generic drugs by claim count, with $146K in brand drug costs.
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 Janice Johnston, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Janice Johnston, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Janice Johnston, M.D. accept Medicare? ▼
Janice Johnston, M.D. appears in CMS Medicare data with 3,173 Part D claims and 767 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Janice Johnston, M.D.'s credentials? ▼
Janice Johnston, M.D.'s NPI is 1144271461 with credentials M.D.. 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.