Charles May, MD
NPI 1245268531 · Psychiatry Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles May, MD is a Psychiatry Physician provider in Knoxville, TN (NPI 1245268531).
Provider details
- NPI number
- 1245268531
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD0000026115 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
409 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 289 | $83 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 120 | $68 |
Typical Medicare-allowed amounts for these services range $68–$83 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alprazolam | 488 | 56 |
| Bupropion Hclbrand: Bupropion Xl | 227 | 44 |
| Duloxetine Hcl | 176 | 39 |
| Clonazepam | 171 | 22 |
| Trazodone Hcl | 164 | 41 |
| Quetiapine Fumarate | 162 | 34 |
| Lamotrigine | 139 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,046 across 52 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-28
- Last updated
- 2007-07-08
Frequently asked questions
- What is Charles May's NPI number?
- Charles May's National Provider Identifier (NPI) is 1245268531, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles May's specialty?
- Charles May is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Charles May located?
- Charles May's practice location on file with NPPES is 1111 N Northshore Dr, Knoxville, TN 37919-4005.
- What is Charles May's phone number?
- The practice phone number listed in the NPPES registry for Charles May is (865) 584-0171.
- Does Charles May accept Medicare?
- Charles May is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles May's NPI active?
- Yes — Charles May's NPI (1245268531) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.