NPI registry status
Active
2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1285744862 M.D.
Verify on CMS → Anne Mack, M.D.
Physical Medicine & Rehabilitation Physician in Wilmington, Delaware.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 15,306 in Physical Medicine & Rehabilitation 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
786
Medicare Part D claims · 63 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 781
Generic prescribing
91%
generic claims · 9% 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
Anne Mack, M.D. filed 786 Medicare Part D claims in 2023 as a Physical Medicine & Rehabilitation Physician in Wilmington, Delaware, prescribing 91% generic.
- 786
- Part D claims, 2023
- 91%
- 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.
Anne Mack, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
786 Top 29% higher than 71% 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)
Anne Mack, 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 Anne Mack, M.D.?
Quality data not reportedPrimary specialty
Physical Medicine & Rehabilitation Physician
Medicare Part D claims
786 1% vs specialty avg
Specialty distribution in Delaware
How Physical Medicine & Rehabilitation Physician compares to other specialties among Delaware 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 Physical Medicine & Rehabilitation 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).
Anne Mack, M.D. appears in the CMS NPPES registry as a Physical Medicine & Rehabilitation Physician provider holding M.D. credentials at 2006 FOULK RD, Wilmington, DE, 19810, with a listed phone of (302) 529-8783. NPI 1285744862 was issued on 08/30/2006.
Medicare Part D records for calendar year 2023 show 786 prescription claims written by this provider, covering 63 Medicare beneficiaries and totaling roughly $46K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 55.6%.
Physical Medicine & Rehabilitation Physician is a mid-sized specialty nationwide, with 15,306 enrolled providers across 54 states and an average of 781 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 | 1285744862 |
|---|---|
| Specialty | Physical Medicine & Rehabilitation Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 08/30/2006 |
Brand vs generic prescribing mix · Generic-heavy
Anne Mack, M.D. - brand share 9.0%
Physical Medicine & Rehabilitation Physician average
9% brand-name claims vs 91% generic, on 786 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.
786
Total Claims
$46K
Total Drug Cost
63
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 843
- Total Day Supply
- 20,239
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $29K
- Generic Drug Cost
- $17K
- Opioid Claims
- 437 (55.6% rate)
Patient Demographics
- Average Patient Age
- 65.5 years
- Avg HCC Risk Score
- 1.69
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 26, 65-74: 23, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Anne Mack, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
107 claims
- Gabapentin
Gabapentin
102 claims
- Baclofen
Baclofen
99 claims
- Morphine Sulfate Er
Morphine Sulfate Er
84 claims
- Oxycodone Hcl
Oxycodone Hcl
83 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
63 claims
- Cyclobenzaprine Hcl 30
Cyclobenzaprine Hcl
30 claims
- Zolpidem Tartrate 28
Zolpidem Tartrate
28 claims
| Drug | Claims |
|---|---|
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 107 |
| Gabapentin | 102 |
| Baclofen | 99 |
| Morphine Sulfate Er Morphine Sulfate | 84 |
| Oxycodone Hcl | 83 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 63 |
| Cyclobenzaprine Hcl | 30 |
| Zolpidem Tartrate | 28 |
| Xtampza Er Oxycodone Myristate | 26 |
| Morphine Sulfate | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Physical Medicine & Rehabilitation Physician in DE →
All providers in Delaware →
Compare specialties →
Physical Medicine & Rehabilitation Physician Overview
How Anne Mack, M.D. fits within the Physical Medicine & Rehabilitation Physician landscape nationally.
15,306
Physical Medicine & Rehabilitation Physician Providers in US
54
States with Physical Medicine & Rehabilitation Physician
781
Avg Claims per Provider
Anne Mack, M.D.'s 786 claims are above the specialty average of 781.
Nearby Physical Medicine & Rehabilitation Physician Providers in Delaware
Other clinicians with the same primary specialty enrolled in Delaware, drawn from the same CMS NPPES roster as Mack.
Dr. Douglas Adams
DPT
Wilmington, DE
Dr. Jennifer Atwood
PT
Middletown, DE
Dr. William Barrish
M.D.
Lewes, DE
Dr. Stephen Beneck
M.D.
Wilmington, DE
Dr. Andrew Bernstein
DPT, PT
Wilmington, DE
Compare Physical Medicine & Rehabilitation 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 Delaware medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physical Medicine & Rehabilitation 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 Anne Mack, M.D.'s specialty? ▼
Anne Mack, M.D. specializes in Physical Medicine & Rehabilitation Physician and practices in Wilmington, Delaware. Credentials: M.D..
How much does Anne Mack, M.D. prescribe under Medicare Part D? ▼
In 2023, Anne Mack, M.D. wrote 786 Medicare Part D claims totaling $46K in drug costs for 63 beneficiaries.
Where is Anne Mack, M.D. located? ▼
Anne Mack, M.D. is located at 2006 FOULK RD, Wilmington, DE, 19810. Phone: (302) 529-8783.
What is Anne Mack, M.D.'s NPI number? ▼
Anne Mack, M.D.'s National Provider Identifier (NPI) is 1285744862, issued on 08/30/2006.
Does Anne Mack, M.D. prescribe more brand-name or generic drugs? ▼
Anne Mack, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $29K in brand drug costs.
Does Anne Mack, M.D. prescribe opioids? ▼
Yes, Anne Mack, M.D. had 437 opioid claims in 2023 with an opioid prescribing rate of 55.6%.
How many Physical Medicine & Rehabilitation Physician providers are there in the US? ▼
There are 15,306 Physical Medicine & Rehabilitation Physician providers across 54 states in the US. The average Physical Medicine & Rehabilitation Physician provider writes 781 Medicare Part D claims per year.
What drugs does Anne Mack, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Anne Mack, M.D.'s most frequently prescribed drugs include Oxycodone-Acetaminophen, Gabapentin, Baclofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Anne Mack, M.D. accept Medicare? ▼
Anne Mack, M.D. appears in CMS Medicare data with 786 Part D claims and 63 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Anne Mack, M.D.'s credentials? ▼
Anne Mack, M.D.'s NPI is 1285744862 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.