2026 NPPES data Sleep Medicine (Psychiatry & Neurology) Physician NPI 1578634929 M.D.
Verify on CMS →

LYDIA WYTRZES, M.D.

Sleep Medicine (Psychiatry & Neurology) Physician in SACRAMENTO, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
334
Medicare Part D claims · 51 beneficiaries · Sleep Medicine (Psychiatry & Neurology) Physician avg: 1K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

LYDIA WYTRZES, M.D. filed 334 Medicare Part D claims in 2023 as a Sleep Medicine (Psychiatry & Neurology) Physician in SACRAMENTO, California, prescribing 90% generic.

334
Part D claims, 2023
90%
generic prescribing

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.

LYDIA WYTRZES, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

334 Top 43% higher than 57% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 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

Board-eligible specialty (heuristic — not verified)

LYDIA WYTRZES, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about LYDIA WYTRZES, M.D.?

Quality data not reported

NPI registry status

Active

Issued 11/09/2006

NPI 1578634929

Primary specialty

Sleep Medicine (Psychiatry & Neurology) Physician

Rare

371 US NPIs in this specialty

Medicare Part D claims

334 67% vs specialty avg

2023 prescription claims

Specialty avg: 1,005

Specialty distribution in California

How Sleep Medicine (Psychiatry & Neurology) Physician compares to other specialties among California providers

California providers

Sleep Medicine (Psychiatry & Neurology) Physician share within California

1. Sleep Medicine (Psychiatry & Neurology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Sleep Medicine (Psychiatry & Neurology) Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Sleep Medicine (Psychiatry & Neurology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Sleep Medicine (Psychiatry & Neurology) Physician ABMS/AOA estimate

Est. board-certified rate (Sleep Medicine (Psychiatry & Neurology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Sleep Medicine (Psychiatry & Neurology) Physician) — 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).

LYDIA WYTRZES, M.D. appears in the CMS NPPES registry as a Sleep Medicine (Psychiatry & Neurology) Physician provider holding M.D. credentials at 87 SCRIPPS DR, SACRAMENTO, CA, 95825, with a listed phone of (916) 564-3610. NPI 1578634929 was issued on 11/09/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WYTRZES 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 334 prescription claims written by this provider, covering 51 Medicare beneficiaries and totaling roughly $40K in drug spend, split 10% brand-name and 90% generic by claim count. 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.

Sleep Medicine (Psychiatry & Neurology) Physician is a narrow specialty nationwide, with 371 enrolled providers across 45 states and an average of 1,005 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

87 SCRIPPS DR
SACRAMENTO, CA 95825

Provider Details

NPI 1578634929
Specialty Sleep Medicine (Psychiatry & Neurology) Physician
Credentials M.D.
Gender Female
NPI Issued 11/09/2006

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 LYDIA WYTRZES, M.D.. To verify LYDIA WYTRZES, 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.

Brand vs generic prescribing mix · Typical

LYDIA WYTRZES, M.D. — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 334 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

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

334
Total Claims
$40K
Total Drug Cost
51
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
541
Total Day Supply
16,086
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$23K
Generic Drug Cost
$17K

Patient Demographics

Average Patient Age
76.7 years
Avg HCC Risk Score
1.19
Gender Split
55% female / 45% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What LYDIA WYTRZES, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Gabapentin
71
Modafinil
34
Pramipexole Dihydrochloride
Pramipexole Di-Hcl
30
Ropinirole Hcl
20
Trazodone Hcl
19
Eszopiclone
16
Neupro
Rotigotine
16
Zolpidem Tartrate
16
Clonazepam
15
Doxepin Hcl
15

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Sleep Medicine (Psychiatry & Neurology) Physician Overview

How LYDIA WYTRZES, M.D. fits within the Sleep Medicine (Psychiatry & Neurology) Physician landscape nationally.

371
Sleep Medicine (Psychiatry & Neurology) Physician Providers in US
45
States with Sleep Medicine (Psychiatry & Neurology) Physician
1,005
Avg Claims per Provider

LYDIA WYTRZES, M.D.'s 334 claims are below the specialty average of 1,005.

Nearby Sleep Medicine (Psychiatry & Neurology) Physician Providers in California

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

Compare Sleep Medicine (Psychiatry & Neurology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is LYDIA WYTRZES, M.D.'s specialty?
LYDIA WYTRZES, M.D. specializes in Sleep Medicine (Psychiatry & Neurology) Physician and practices in SACRAMENTO, California. Credentials: M.D..
How much does LYDIA WYTRZES, M.D. prescribe under Medicare Part D?
In 2023, LYDIA WYTRZES, M.D. wrote 334 Medicare Part D claims totaling $40K in drug costs for 51 beneficiaries.
Where is LYDIA WYTRZES, M.D. located?
LYDIA WYTRZES, M.D. is located at 87 SCRIPPS DR, SACRAMENTO, CA, 95825. Phone: (916) 564-3610.
What is LYDIA WYTRZES, M.D.'s NPI number?
LYDIA WYTRZES, M.D.'s National Provider Identifier (NPI) is 1578634929, issued on 11/09/2006.
Does LYDIA WYTRZES, M.D. prescribe more brand-name or generic drugs?
LYDIA WYTRZES, M.D.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $23K in brand drug costs.
How many Sleep Medicine (Psychiatry & Neurology) Physician providers are there in the US?
There are 371 Sleep Medicine (Psychiatry & Neurology) Physician providers across 45 states in the US. The average Sleep Medicine (Psychiatry & Neurology) Physician provider writes 1,005 Medicare Part D claims per year.
What drugs does LYDIA WYTRZES, M.D. prescribe most often?
Based on 2023 Medicare Part D data, LYDIA WYTRZES, M.D.'s most frequently prescribed drugs include Gabapentin, Modafinil, Pramipexole Dihydrochloride. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LYDIA WYTRZES, M.D. accept Medicare?
LYDIA WYTRZES, M.D. appears in CMS Medicare data with 334 Part D claims and 51 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LYDIA WYTRZES, M.D.'s credentials?
LYDIA WYTRZES, M.D.'s NPI is 1578634929 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