Charles Mahdy
NPI 1750978755 · Psychiatric/Mental Health Nurse Practitioner · Waltham, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Mahdy is a Psychiatric/Mental Health Nurse Practitioner provider in Waltham, MA (NPI 1750978755).
Provider details
- NPI number
- 1750978755
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- RN2320527 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
5 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
162 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 92 | $81 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 50 | $63 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 20 | $164 |
Typical Medicare-allowed amounts for these services range $63–$164 (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 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonidine Hcl | 35 | 11 |
| Gabapentin | 34 | 13 |
| Quetiapine Fumarate | 33 | 11 |
| Sertraline Hcl | 32 | 11 |
| Trazodone Hcl | 29 | 12 |
| Clonazepam | 24 | — |
| Lithium Carbonate | 24 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-12-23
- Last updated
- 2021-04-26
- Certified
- 2021-04-26
Frequently asked questions
- What is Charles Mahdy's NPI number?
- Charles Mahdy's National Provider Identifier (NPI) is 1750978755, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Mahdy's specialty?
- Charles Mahdy is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Charles Mahdy located?
- Charles Mahdy's practice location on file with NPPES is 19 Winthrop St Apt 1, Waltham, MA 02453-2831.
- What is Charles Mahdy's phone number?
- The practice phone number listed in the NPPES registry for Charles Mahdy is (617) 230-8129.
- Does Charles Mahdy accept Medicare?
- Charles Mahdy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Mahdy's NPI active?
- Yes — Charles Mahdy's NPI (1750978755) is active in the NPPES registry as of the last update on 2021-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.