DR. MARIAN LOUIS MD
NPI 1457491144
Psychiatry & Neurology - Psychiatry in Sacramento, CA

Q: What is Marian Louis's NPI number?

The NPI number for Marian Louis is 1457491144. It was assigned to this individual provider in the NPPES registry on February 8, 2007.

Q: What is Marian Louis's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for Marian Louis was last updated on June 2, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 08, 2007PECOS EnrolledAccepts Medicare Assignment

650 HOWE AVE BLDG 400-B, SACRAMENTO, CA 95825(916) 993-4131 Get Directions Write a Review

NPPES record last updated: June 2, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 2, 2021, Nov 17, 2020 (2 updates tracked since 2020).

On this page

About Dr. Marian Louis Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARIAN LOUIS MD (NPI 1457491144) is an individual psychiatry provider in Sacramento, California, licensed in California (G140111) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of New York Medical College (1978).

NPPES Registry Identity

NPI1457491144

Entity TypeIndividualFemale

Primary Taxonomy2084P0800X

Provider Legal NameDR. MARIAN LOUISCredential: MD

Location Address650 HOWE AVE BLDG 400-BSacramento, CA 95825-4731

Mailing Address650 Howe Ave Bldg 400-bSacramento, CA 95825-4731 · (916) 933-4131

Phone(916) 993-4131

Sole ProprietorNo

Medical School CMSNew York Medical CollegeGraduated 1978

Enumeration DateFebruary 8, 2007

Last NPPES UpdateJune 2, 20212 updates tracked since enumeration

NPPES CertifiedJune 2, 2021

✔ NPI 1457491144 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

Licenses✔ Licensed in CA · G140111✔ Licensed in NY · 155532

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

650 HOWE AVE BLDG 400-B, Sacramento, CA 95825

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Marian Louis Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3072783232

PECOS Enrollment IDI20180910003057

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Marian Louis reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Tlcs, Inc.

0.1 mi

Adult Mental Health

650 HOWE AVE BLDG 400-B
Sacramento, CA 95825

Reassigned Medicare billing, California enrollment
Medicare enrollment name: County Of Sacramento
45 clinicians in this Medicare group

NPI 1861566820 (916) 441-0123

Yolo County Health And Human Services Agency

6.2 mi

Community/Behavioral Health

500 JEFFERSON BLVD # B, SUITE 150
West Sacramento, CA 95605

Reassigned Medicare billing, California enrollment
10 clinicians in this Medicare group

NPI 1033241112 (916) 375-6350

County Of Santa Clara

83 mi

Federally Qualified Health Center (FQHC)

143 N MAIN ST
Milpitas, CA 95035

Reassigned Medicare billing, California enrollment
2,460 clinicians in this Medicare group

NPI 1285629899 (408) 885-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

76 services35 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95825 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$180.85 typical visit price

range $60.44 – $180.85

Typical copayment $45.21 (range $15.11 – $45.21)

Most-billed visit code 99205

Established Patient

$75.03 typical visit price

range $19.88 – $148.15

Typical copayment $18.75 (range $4.97 – $37.03)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 19

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AMBER LEE VINSON

Adult Companion