Clarence Shannon, MD
Anesthesiology Physician in Washington, District of Columbia. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 56,398 in Anesthesiology 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.
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Clarence Shannon, MD reported a CMS MIPS final score of 82.3/100 - below the 83.1 national average - and filed 651 Medicare Part D claims in 2023.
- 82.3/100
- MIPS score · -1 vs avg
- 651
- Part D claims, 2023
- 94%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Clarence Shannon, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
82 39th percentile higher than 39% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Clarence Shannon, MD sits
This provider among anesthesiology physician peers
Across the 1,666 anesthesiology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Clarence Shannon, MD writes more Part D claims than 54% of them and scores higher on MIPS quality than 51% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one anesthesiology physician peer from a representative sample of 60; the gold marker is Clarence Shannon, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
Clarence Shannon, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Clarence Shannon, MD?
Near national averagePrimary specialty
Medicare Part D claims
MIPS final score
Specialty distribution in District of Columbia
How Anesthesiology Physician compares to other specialties among District of Columbia providers
Largest specialties in District of Columbia (% of in-state providers)
Anesthesiology Physician ranks #30 among District of Columbia's specialties (0.6% of in-state providers)
Each bar is a specialty's share of the District of Columbia provider total, by primary NUCC taxonomy. The highlighted bar is Anesthesiology Physician; the long tail of smaller specialties is omitted for legibility.
Medicare quality performance, MIPS
Clarence Shannon, MD's 2023 MIPS final score plotted against the Anesthesiology Physician national average
- MIPS Final Score
- 82.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Anesthesiology Physician) - 82.3/100 vs national avg 83.1
Quality benchmarks
- National MIPS avg 2023 reporting year
- Quality dim CMS Quality category
- Cost dim CMS Cost category
- Specialty volume Anesthesiology Physician US NPIs
82.3/100 MIPS final score - 0.8 pts below the 83.1 national average
Quality, Cost, Promoting Interoperability, and Improvement Activities composite score for the 2023 performance year. Specialty: Anesthesiology Physician. Quality dim: 81.5. Cost dim: 38.2.
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).
Clarence Shannon, MD appears in the CMS NPPES registry as a Anesthesiology Physician provider holding MD credentials at 6900 GEORGIA AVE, NW , WARD 44, Washington, DC, 20307, with a listed phone of (202) 782-0039. NPI 1851516165 was issued on 04/13/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Shannon most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.
Medicare Part D records for calendar year 2023 show 651 prescription claims written by this provider, covering 82 Medicare beneficiaries and totaling roughly $32K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 37.9%. These figures capture only Medicare Part D, commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 82.3/100 for the 2023 performance year (Quality 81.5, Cost 38.2), compared with the national average of 83.1.
Anesthesiology Physician is a high-volume specialty nationwide, with 56,398 enrolled providers across 56 states and an average of 860 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 | 1851516165 |
|---|---|
| Specialty | Anesthesiology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/13/2007 |
Verify this provider's license
PlainDoctor pulls this profile from the CMS NPPES public registry. Confirm Clarence Shannon, MD's current license status, disciplinary history, and board certifications with the D.C. Board of Medicine in District of Columbia before relying on this page for a clinical or care decision.
How we sourced this profile
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
Reporting: Group practice
Hospital and facility affiliations
Facilities where Clarence Shannon, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
According to CMS billing records, Clarence Shannon, MD is affiliated with 3 Medicare-billing facilities.
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Clarence Shannon, MD. Source: openpaymentsdata.cms.gov.
Total received
$190
Largest payer
Medtronic, 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 · Generic-heavy
6% brand-name claims vs 94% generic, on 651 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.
Prescribing Breakdown
- 30-Day Fills
- 742
- Total Day Supply
- 19,312
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $16K
- Generic Drug Cost
- $16K
- Opioid Claims
- 247 (37.9% rate)
Patient Demographics
- Average Patient Age
- 68.5 years
- Avg HCC Risk Score
- 1.73
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 17, 65-74: 50, 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 Clarence Shannon, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
101 claims
- Oxycodone Hcl
Oxycodone Hcl
79 claims
- Tramadol Hcl
Tramadol Hcl
68 claims
- Pregabalin
Pregabalin
63 claims
- Duloxetine Hcl
Duloxetine Hcl
51 claims
- Meloxicam
Meloxicam
45 claims
- Baclofen 28
Baclofen
28 claims
- Methocarbamol 28
Methocarbamol
28 claims
| Drug | Claims |
|---|---|
| Gabapentin | 101 |
| Oxycodone Hcl | 79 |
| Tramadol Hcl | 68 |
| Pregabalin | 63 |
| Duloxetine Hcl | 51 |
| Meloxicam | 45 |
| Baclofen | 28 |
| Methocarbamol | 28 |
| Tizanidine Hcl | 27 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Anesthesiology Physician Overview
How Clarence Shannon, MD fits within the Anesthesiology Physician landscape nationally.
Clarence Shannon, MD's 651 claims are below the specialty average of 860.
Nearby Anesthesiology Physician Providers in District of Columbia
Other clinicians with the same primary specialty enrolled in District of Columbia, drawn from the same CMS NPPES roster as Shannon.
Compare Anesthesiology 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 District of Columbia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Anesthesiology 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
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Data Sources
- 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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