NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1386693992 MD
Verify on CMS → Karen Box, MD
Endocrinology, Diabetes & Metabolism Physician in Prescott, 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 7,852 in Endocrinology, Diabetes & Metabolism 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
895
Medicare Part D claims · 249 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
51%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
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 Box, MD filed 895 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Prescott, Arizona, prescribing 51% generic.
- 895
- Part D claims, 2023
- 51%
- generic prescribing
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 Box, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
895 Top 27% higher than 73% 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 Box, 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 Box, MD?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
895 66% vs specialty avg
Specialty distribution in Arizona
How Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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 Box, MD appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 1050 GAIL GARDNER WAY STE 300, Prescott, AZ, 86305, with a listed phone of (928) 717-5240. NPI 1386693992 was issued on 05/09/2006.
Medicare Part D records for calendar year 2023 show 895 prescription claims written by this provider, covering 249 Medicare beneficiaries and totaling roughly $396K in drug spend, split 44% brand-name and 51% generic by claim count.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,852 enrolled providers across 54 states and an average of 2,639 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 | 1386693992 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/09/2006 |
Brand vs generic prescribing mix · Above average
Karen Box, MD - brand share 44.0%
Endocrinology, Diabetes & Metabolism Physician average
44% brand-name claims vs 51% generic, on 895 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.
895
Total Claims
$396K
Total Drug Cost
249
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,177
- Total Day Supply
- 64,674
- Brand vs Generic
- 44% brand / 51% generic
- Brand Drug Cost
- $375K
- Generic Drug Cost
- $15K
Patient Demographics
- Average Patient Age
- 72.0 years
- Avg HCC Risk Score
- 1.51
- Gender Split
- 62% female / 38% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Karen Box, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
170 claims
- Atorvastatin Calcium 53
Atorvastatin Calcium
53 claims
- Losartan Potassium 40
Losartan Potassium
40 claims
- Hydrocortisone 39
Hydrocortisone
39 claims
- Jardiance 39
Jardiance
39 claims
- Alendronate Sodium 28
Alendronate Sodium
28 claims
- Rosuvastatin Calcium 28
Rosuvastatin Calcium
28 claims
- Novolog Flexpen 26
Novolog Flexpen
26 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 170 |
| Atorvastatin Calcium | 53 |
| Losartan Potassium | 40 |
| Hydrocortisone | 39 |
| Jardiance Empagliflozin | 39 |
| Alendronate Sodium | 28 |
| Rosuvastatin Calcium | 28 |
| Novolog Flexpen Insulin Aspart | 26 |
| Trulicity Dulaglutide | 26 |
| Humalog Insulin Lispro | 24 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in AZ →
All providers in Arizona →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Karen Box, MD fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,852
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Karen Box, MD's 895 claims are below the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Box.
Dr. Rashi Agarwal
M.D.
Peoria, AZ
Dr. Seema Ahluwalia
M.D.
Chandler, AZ
Dr. Adnan Ajmal
MD
Phoenix, AZ
Dr. Osamah Al Ali
MD
Scottsdale, AZ
Dr. Dalal Alromaihi
M.D.
Yuma, AZ
Compare Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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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Frequently Asked Questions
What is Karen Box, MD's specialty? ▼
Karen Box, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Prescott, Arizona. Credentials: MD.
How much does Karen Box, MD prescribe under Medicare Part D? ▼
In 2023, Karen Box, MD wrote 895 Medicare Part D claims totaling $396K in drug costs for 249 beneficiaries.
Where is Karen Box, MD located? ▼
Karen Box, MD is located at 1050 GAIL GARDNER WAY STE 300, Prescott, AZ, 86305. Phone: (928) 717-5240.
What is Karen Box, MD's NPI number? ▼
Karen Box, MD's National Provider Identifier (NPI) is 1386693992, issued on 05/09/2006.
Does Karen Box, MD prescribe more brand-name or generic drugs? ▼
Karen Box, MD's prescribing is 44% brand-name and 51% generic drugs by claim count, with $375K in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,852 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Karen Box, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Karen Box, MD's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Karen Box, MD accept Medicare? ▼
Karen Box, MD appears in CMS Medicare data with 895 Part D claims and 249 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karen Box, MD's credentials? ▼
Karen Box, MD's NPI is 1386693992 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.