Louis Gallagher, PH.D.
NPI 1851303861 · Psychologist · Chapin, SC
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Gallagher, PH.D. is a Psychologist provider in Chapin, SC (NPI 1851303861).
Provider details
- NPI number
- 1851303861
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 007269 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
938 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) |
|---|---|---|
| Psychiatric Services Complicated By Communication Factor90785 | 380 | $14 |
| Psychotherapy, 1 Hour90837 | 356 | $145 |
| Psychotherapy, 45 Minutes90834 | 116 | $99 |
| Psychiatric Diagnostic Evaluation90791 | 43 | $163 |
| Psychotherapy, 30 Minutes90832 | 43 | $75 |
Typical Medicare-allowed amounts for these services range $14–$163 (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.
Practice location
Mailing address
Additional practice locations (1)
- 22 Lawrence AveSuite 213Smithtown, NY 11787-3619Phone: (631) 265-0877Fax: (631) 265-0879
Registry dates
- Enumerated
- 2006-08-12
- Last updated
- 2022-03-01
- Certified
- 2022-03-01
Frequently asked questions
- What is Louis Gallagher's NPI number?
- Louis Gallagher's National Provider Identifier (NPI) is 1851303861, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Gallagher's specialty?
- Louis Gallagher is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Louis Gallagher located?
- Louis Gallagher's practice location on file with NPPES is 2101 Dutch Fork Rd, Chapin, SC 29036-7576.
- What is Louis Gallagher's phone number?
- The practice phone number listed in the NPPES registry for Louis Gallagher is (910) 338-2885.
- Does Louis Gallagher accept Medicare?
- Louis Gallagher is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Gallagher's NPI active?
- Yes — Louis Gallagher's NPI (1851303861) is active in the NPPES registry as of the last update on 2022-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.