NPI registry status
Active
2026 NPPES data Specialist NPI 1255428231 MD
Verify on CMS → Edward Workman, MD
Specialist in Knoxville, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,658 in Specialist, 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
686
Medicare Part D claims · 29 beneficiaries · Specialist 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, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Edward Workman, MD filed 686 Medicare Part D claims in 2023 as a Specialist in Knoxville, Tennessee, prescribing 98% generic.
- 686
- Part D claims, 2023
- 98%
- 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.
Edward Workman, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
686 Top 31% higher than 69% 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
What does the federal data show about Edward Workman, MD?
Quality data not reportedPrimary specialty
Specialist
Medicare Part D claims
686 53% vs specialty avg
Specialty distribution in Tennessee
How Specialist compares to other specialties among Tennessee 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 Specialist. 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).
Edward Workman, MD appears in the CMS NPPES registry as a Specialist provider holding MD credentials at 110 PERIMETER PARK RD STE C, Knoxville, TN, 37922, with a listed phone of (865) 862-0763. NPI 1255428231 was issued on 10/09/2006.
Medicare Part D records for calendar year 2023 show 686 prescription claims written by this provider, covering 29 Medicare beneficiaries and totaling roughly $38K in drug spend, split 2% brand-name and 98% generic by claim count, with an opioid prescribing rate of 29.2%.
Specialist is a high-volume specialty nationwide, with 69,658 enrolled providers across 55 states and an average of 1,474 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 | 1255428231 |
|---|---|
| Specialty | Specialist |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/09/2006 |
Brand vs generic prescribing mix · Generic-heavy
Edward Workman, MD - brand share 2.0%
Specialist average
2% brand-name claims vs 98% generic, on 686 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.
686
Total Claims
$38K
Total Drug Cost
29
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 781
- Total Day Supply
- 22,560
- Brand vs Generic
- 2% brand / 98% generic
- Brand Drug Cost
- $4K
- Generic Drug Cost
- $34K
- Opioid Claims
- 200 (29.2% rate)
Patient Demographics
- Average Patient Age
- 65.0 years
- Avg HCC Risk Score
- 1.39
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 15, 65-74: 11, 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 Edward Workman, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Oxycodone Hcl
Oxycodone Hcl
148 claims
- Gabapentin
Gabapentin
83 claims
- Tizanidine Hcl 55
Tizanidine Hcl
55 claims
- Trazodone Hcl 39
Trazodone Hcl
39 claims
- Clonazepam 34
Clonazepam
34 claims
- Escitalopram Oxalate 34
Escitalopram Oxalate
34 claims
- Diclofenac Sodium 27
Diclofenac Sodium
27 claims
- Oxymorphone Hcl Er 26
Oxymorphone Hcl Er
26 claims
| Drug | Claims |
|---|---|
| Oxycodone Hcl | 148 |
| Gabapentin | 83 |
| Tizanidine Hcl | 55 |
| Trazodone Hcl | 39 |
| Clonazepam | 34 |
| Escitalopram Oxalate | 34 |
| Diclofenac Sodium | 27 |
| Oxymorphone Hcl Er Oxymorphone Hcl | 26 |
| Morphine Sulfate Er Morphine Sulfate | 23 |
| Celecoxib | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Edward Workman, MD fits within the Specialist landscape nationally.
69,658
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Edward Workman, MD's 686 claims are below the specialty average of 1,474.
Nearby Specialist Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Workman.
Dr. Salim Abdun
PT
Cordova, TN
Dr. Colleen Able
PT
Memphis, TN
Dr. Ali Abualhayjaa
MD
Jackson, TN
Dr. John Adams
M.D.
Knoxville, TN
Dr. Thomas Adkins
M.D.
Nashville, TN
Compare Specialist 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 Tennessee medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Specialist 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
Step-by-step guide to choosing a provider
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Check NPI, board certification & license status
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 Tennessee
Frequently Asked Questions
What is Edward Workman, MD's specialty? ▼
Edward Workman, MD specializes in Specialist and practices in Knoxville, Tennessee. Credentials: MD.
How much does Edward Workman, MD prescribe under Medicare Part D? ▼
In 2023, Edward Workman, MD wrote 686 Medicare Part D claims totaling $38K in drug costs for 29 beneficiaries.
Where is Edward Workman, MD located? ▼
Edward Workman, MD is located at 110 PERIMETER PARK RD STE C, Knoxville, TN, 37922. Phone: (865) 862-0763.
What is Edward Workman, MD's NPI number? ▼
Edward Workman, MD's National Provider Identifier (NPI) is 1255428231, issued on 10/09/2006.
Does Edward Workman, MD prescribe more brand-name or generic drugs? ▼
Edward Workman, MD's prescribing is 2% brand-name and 98% generic drugs by claim count, with $4K in brand drug costs.
Does Edward Workman, MD prescribe opioids? ▼
Yes, Edward Workman, MD had 200 opioid claims in 2023 with an opioid prescribing rate of 29.2%.
How many Specialist providers are there in the US? ▼
There are 69,658 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Edward Workman, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Edward Workman, MD's most frequently prescribed drugs include Oxycodone Hcl, Gabapentin, Tizanidine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Edward Workman, MD accept Medicare? ▼
Edward Workman, MD appears in CMS Medicare data with 686 Part D claims and 29 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Edward Workman, MD's credentials? ▼
Edward Workman, MD's NPI is 1255428231 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.