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Healthcare providers in Maryland: counts by specialty
How many healthcare providers work in Maryland? The federal NPPES registry listed 211,064 active NPIs with a practice address in the state as of the June 2026 snapshot, the 14th largest workforce among the 50 states and the District of Columbia. The single largest specialty is Behavior Technician, and Baltimore is the city with the most records. The table below lists the 30 specialties with the most active providers and the share each one holds.
The 30 largest specialties in Maryland
| # | Specialty (primary taxonomy) | Active NPIs | % of state |
|---|---|---|---|
| 1 | Behavior Technician | 23,484 | 11.1% |
| 2 | Clinical Social Worker | 10,477 | 5.0% |
| 3 | Physical Therapist | 7,240 | 3.4% |
| 4 | Home Health Aide | 7,031 | 3.3% |
| 5 | Student in an Organized Health Care Education/Training Program | 5,910 | 2.8% |
| 6 | Pharmacist | 5,606 | 2.7% |
| 7 | Internal Medicine Physician | 5,597 | 2.7% |
| 8 | Mental Health Counselor | 5,295 | 2.5% |
| 9 | Speech-Language Pathologist | 4,802 | 2.3% |
| 10 | Professional Counselor | 4,762 | 2.3% |
| 11 | Family Nurse Practitioner | 4,526 | 2.1% |
| 12 | Social Worker | 4,090 | 1.9% |
| 13 | Psychiatric/Mental Health Nurse Practitioner | 3,339 | 1.6% |
| 14 | General Practice Dentistry | 3,320 | 1.6% |
| 15 | Physician Assistant | 3,233 | 1.5% |
| 16 | Occupational Therapist | 3,119 | 1.5% |
| 17 | Family Medicine Physician | 2,932 | 1.4% |
| 18 | Community/Behavioral Health Agency | 2,898 | 1.4% |
| 19 | Registered Nurse | 2,485 | 1.2% |
| 20 | Dentist | 2,413 | 1.1% |
| 21 | Pediatrics Physician | 2,276 | 1.1% |
| 22 | Home Health Agency | 2,221 | 1.1% |
| 23 | Mental Health Clinic/Center (Including Community Mental Health Center) | 2,211 | 1.0% |
| 24 | Psychiatry Physician | 2,009 | 1.0% |
| 25 | Behavior Analyst | 1,949 | 0.9% |
| 26 | Case Manager/Care Coordinator | 1,810 | 0.9% |
| 27 | Clinical Psychologist | 1,784 | 0.8% |
| 28 | Specialist | 1,661 | 0.8% |
| 29 | Anesthesiology Physician | 1,661 | 0.8% |
| 30 | Optometrist | 1,568 | 0.7% |
What the numbers show
Behavior Technician leads with 23,484 active records, 11.1% of everything the state has, or 2.2 times the volume of Clinical Social Worker, the runner up at 10,477. Physical Therapist rounds out the podium with 7,240. Together, the top 5 specialties account for 25.7% of Maryland's providers, and the 30 listed in the table cover 62.4% of the total. Overall, the state registry splits into 770 distinct taxonomies.
Geographically, active NPIs spread across 755 cities and towns in the state, but with heavy concentration: Baltimore (44,696), Rockville (15,305) and Silver Spring (8,584) post the largest volumes. Maryland holds 2.3% of all active US providers registered across the 50 states and the District of Columbia.
Source and method
Data: NPPES Data Dissemination file (National Plan and Provider Enumeration System), published by CMS as public domain data, snapshot of June 2026. Each provider is counted once, in the state and city of the Provider Business Practice Location, under the primary taxonomy declared in the NPI record itself. Only active NPI records are counted.
Important: an active NPI does not mean the professional is currently practicing, accepting new patients or even still working in the field; it only means the registration number remains valid. This page publishes aggregate counts only, never individual records.
Last updated: · Methodology and sources