Louisa Martin, PMHCNS-BC
NPI 1669439337 · Psychiatric/Mental Health Nurse Practitioner · Waltham, MA
Enrolled with Medicare as Practitioner - Certified Clinical Nurse Specialist (cns) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louisa Martin, PMHCNS-BC is a Psychiatric/Mental Health Nurse Practitioner provider in Waltham, MA (NPI 1669439337).
Provider details
- NPI number
- 1669439337
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PMHCNS-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 238093 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
97 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 97 | $119 |
Typical Medicare-allowed amounts for these services range $119–$119 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Lorazepam | 34 |
| Fluoxetine Hcl | 26 |
| Trazodone Hcl | 25 |
| Quetiapine Fumarate | 24 |
| Clonazepam | 19 |
| Escitalopram Oxalate | 18 |
| Lamotrigine | 18 |
| Bupropion Hcl | 16 |
| Sertraline Hcl | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (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
- 2006-04-27
- Last updated
- 2020-01-27
- Certified
- 2020-01-27
Frequently asked questions
- What is Louisa Martin's NPI number?
- Louisa Martin's National Provider Identifier (NPI) is 1669439337, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louisa Martin's specialty?
- Louisa Martin is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Louisa Martin located?
- Louisa Martin's practice location on file with NPPES is 210 Bear Hill Rd, Waltham, MA 02451-1023.
- What is Louisa Martin's phone number?
- The practice phone number listed in the NPPES registry for Louisa Martin is (781) 966-0070.
- Does Louisa Martin accept Medicare?
- Louisa Martin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louisa Martin's NPI active?
- Yes — Louisa Martin's NPI (1669439337) is active in the NPPES registry as of the last update on 2020-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.