2026 NPPES data Mental Health Counselor NPI 1639440977 M.D.
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Luis Fernandez, M.D.

Mental Health Counselor in Palo Alto, California. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers — including 292,612 in Mental Health Counselor, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration — see our methodology.

Federal data — no proprietary rating. We show these CMS records as-is — no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
27
Medicare Part D claims · Mental Health Counselor avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Luis Fernandez, M.D. filed 27 Medicare Part D claims in 2023 as a Mental Health Counselor in Palo Alto, California.

27
Part D claims, 2023

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

Luis Fernandez, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

27 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about Luis Fernandez, M.D.?

Quality data not reported

NPI registry status

Active

Issued 01/18/2012

NPI 1639440977

Primary specialty

Mental Health Counselor

High-volume

292,612 US NPIs in this specialty

Medicare Part D claims

27 97% vs specialty avg

2023 prescription claims

Specialty avg: 1,063

Specialty distribution in California

How Mental Health Counselor compares to other specialties among California providers

California providers

Largest specialties in California (% of in-state providers)

Behavior Technician - 17.3%Behavior Technician17.3%Marriage & Family Therapist - 5.5%Marriage & Family Therapist5.5%Student in an Organized Health Care Education/Training Program - 5%Student in an Organized Health Care Education/Training Program5%Mental Health Counselor - 3.9%Mental Health Counselor3.9%Pharmacist - 3.5%Pharmacist3.5%Clinical Social Worker - 3.1%Clinical Social Worker3.1%
Largest specialties in California (% of in-state providers)

Specialty board-certification context

Estimated specialty board-certified rate — Mental Health Counselor (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Mental Health Counselor ABMS/AOA estimate

Est. board-certified rate (Mental Health Counselor) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Mental Health Counselor) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Luis Fernandez, M.D. appears in the CMS NPPES registry as a Mental Health Counselor provider holding M.D. credentials at 401 QUARRY RD, Palo Alto, CA, 94304, with a listed phone of (650) 723-6643. NPI 1639440977 was issued on 01/18/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Fernandez most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 27 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $3K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Mental Health Counselor is a high-volume specialty nationwide, with 292,612 enrolled providers across 55 states and an average of 1,063 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

401 QUARRY RD
Palo Alto, CA 94304

Provider Details

NPI 1639440977
Specialty Mental Health Counselor
Credentials M.D.
Gender Male
NPI Issued 01/18/2012

Hospital and facility affiliations

Facilities where Luis Fernandez, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

County OF San Mateo
San Mateo, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context — California MBC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 — they are NOT specific to Luis Fernandez, M.D.. To verify Luis Fernandez, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

27
Total Claims
$3K
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
57
Total Day Supply
1,648
Generic Drug Cost
$578

Patient Demographics

Average Patient Age
68.2 years
Avg HCC Risk Score
1.00

Mental Health Counselor Overview

How Luis Fernandez, M.D. fits within the Mental Health Counselor landscape nationally.

292,612
Mental Health Counselor Providers in US
55
States with Mental Health Counselor
1,063
Avg Claims per Provider

Luis Fernandez, M.D.'s 27 claims are below the specialty average of 1,063.

Nearby Mental Health Counselor Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Fernandez.

Compare Mental Health Counselor nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the California medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Mental Health Counselor peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Luis Fernandez, M.D.'s specialty?
Luis Fernandez, M.D. specializes in Mental Health Counselor and practices in Palo Alto, California. Credentials: M.D..
How much does Luis Fernandez, M.D. prescribe under Medicare Part D?
In 2023, Luis Fernandez, M.D. wrote 27 Medicare Part D claims totaling $3K in drug costs for N/A beneficiaries.
Where is Luis Fernandez, M.D. located?
Luis Fernandez, M.D. is located at 401 QUARRY RD, Palo Alto, CA, 94304. Phone: (650) 723-6643.
What is Luis Fernandez, M.D.'s NPI number?
Luis Fernandez, M.D.'s National Provider Identifier (NPI) is 1639440977, issued on 01/18/2012.
How many Mental Health Counselor providers are there in the US?
There are 292,612 Mental Health Counselor providers across 55 states in the US. The average Mental Health Counselor provider writes 1,063 Medicare Part D claims per year.
Does Luis Fernandez, M.D. accept Medicare?
Luis Fernandez, M.D. appears in CMS Medicare data with 27 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Luis Fernandez, M.D.'s credentials?
Luis Fernandez, M.D.'s NPI is 1639440977 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the PlainDoctor editorial team.