2026 NPPES data Neurology Physician NPI 1104925171 M.D.
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Ann Bass, M.D.

Neurology Physician in San Antonio, Texas. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 19,866 in Neurology Physician, 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
3K
Medicare Part D claims · 318 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
83%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75.3/100
▼ 8 pts below national avg 83.1 · Above neutral
Industry payments
$199.5K
356 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Ann Bass, M.D. reported a CMS MIPS final score of 75.3/100 - below the 83.1 national average - and filed 2,956 Medicare Part D claims in 2023.

75.3/100
MIPS score · -8 vs avg
3K
Part D claims, 2023
83%
generic prescribing
Likely
board-certified (heuristic)

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.

Ann Bass, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

75 15th percentile higher than 15% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). This entry sits in this band. 80–90: 129,887 scored providers (27%). Above this entry. 90+: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Where Ann Bass, M.D. sits

This provider among neurology physician peers

Across the 5,437 neurology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Ann Bass, M.D. writes more Part D claims than 81% of them and scores higher on MIPS quality than 23% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.448.873.297.7Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 33Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 72Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 32Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 80Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 37Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 35Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 13Ann Bass, M.D.-Part D claim volume, percentile in specialty: 81 · MIPS quality, percentile: 23
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one neurology physician peer from a representative sample of 60; the gold marker is Ann Bass, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

Board certification likely (heuristic, not verified)

Ann Bass, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Ann Bass, M.D.?

Below national average

NPI registry status

Active

Issued 09/22/2006

NPI 1104925171

Primary specialty

Neurology Physician

Mid-sized

19,866 US NPIs in this specialty

Medicare Part D claims

2,956 126% vs specialty avg

2023 prescription claims

Specialty avg: 1,309

MIPS final score

75.3/100 7.8 pts vs avg

Above neutral band

vs 83.1 national avg

Specialty distribution in Texas

How Neurology Physician compares to other specialties among Texas providers

Texas providers

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

Behavior Technician - 5.6%Behavior Technician5.6%Student in an Organized Health Care Education/Training Program - 5.1%Student in an Organized Health Care Education/Training Program5.1%Family Nurse Practitioner - 4.5%Family Nurse Practitioner4.5%Professional Counselor - 4.4%Professional Counselor4.4%Pharmacist - 4.4%Pharmacist4.4%Speech-Language Pathologist - 3.9%Speech-Language Pathologist3.9%Neurology Physician - 0.3%Neurology Physician0.3%
Largest specialties in Texas (% of in-state providers)

Medicare quality performance, MIPS

Ann Bass, M.D.'s 2023 MIPS final score plotted against the Neurology Physician national average

Below national average
MIPS Final Score
75.3/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Neurology Physician) - 75.3/100 vs national avg 83.1

0%100%National avg83%75.3%
MIPS final score (Neurology Physician) - 75.3/100 vs national avg 83.1

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).

Ann Bass, M.D. appears in the CMS NPPES registry as a Neurology Physician provider holding M.D. credentials at 1314 E SONTERRA BLVD, San Antonio, TX, 78258, with a listed phone of (210) 490-0016. NPI 1104925171 was issued on 09/22/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Bass 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 2,956 prescription claims written by this provider, covering 318 Medicare beneficiaries and totaling roughly $5.2 million in drug spend, split 16% brand-name and 83% generic by claim count, with an opioid prescribing rate of 1.9%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 75.3/100 for the 2023 performance year (Quality 50.6), compared with the national average of 83.1.

Neurology Physician is a mid-sized specialty nationwide, with 19,866 enrolled providers across 54 states and an average of 1,309 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

1314 E SONTERRA BLVD
San Antonio, TX 78258

Provider Details

NPI 1104925171
Specialty Neurology Physician
Credentials M.D.
Gender Female
NPI Issued 09/22/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

75.3146
Final Score
Avg: 83.1
50.6292
Quality

Reporting: Individual

Hospital and facility affiliations

Facilities where Ann Bass, 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.

According to CMS billing records, Ann Bass, M.D. is affiliated with 3 Medicare-billing facilities.

Neuropro OF Texas
San Antonio, TX
Shea Physical Therapy Specialists LLC
Corpus Christi, TX
Sheth, MD, P.A.
San Antonio, TX

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

Industry payments received (2024) - CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Ann Bass, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$199.5K

Largest payer

Genentech USA, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Ann Bass, M.D.. To verify Ann Bass, M.D.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases

TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

Ann Bass, M.D. - brand share 16.0%
Neurology Physician average

16% brand-name claims vs 83% generic, on 2,956 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.

2,956
Total Claims
$5.2M
Total Drug Cost
318
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,379
Total Day Supply
128,807
Brand vs Generic
16% brand / 83% generic
Brand Drug Cost
$4.8M
Generic Drug Cost
$422K
Opioid Claims
55 (1.9% rate)

Patient Demographics

Average Patient Age
65.1 years
Avg HCC Risk Score
1.86
Gender Split
69% female / 31% male
Age Distribution
<65: 137, 65-74: 108, 75-84: 60, 85+: 13

Top Prescribed Drugs (Medicare Part D)

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

What Ann Bass, 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
145
Duloxetine Hcl
141
Pregabalin
110
Baclofen
93
Alprazolam
92
Tizanidine Hcl
92
Dalfampridine Er
Dalfampridine
87
Carbamazepine
73
Aubagio
Teriflunomide
69
Zolpidem Tartrate
65

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

Neurology Physician Overview

How Ann Bass, M.D. fits within the Neurology Physician landscape nationally.

19,866
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider

Ann Bass, M.D.'s 2,956 claims are above the specialty average of 1,309.

Nearby Neurology Physician Providers in Texas

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

Compare Neurology Physician 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 Texas medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Neurology Physician 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 Ann Bass, M.D.'s specialty?
Ann Bass, M.D. specializes in Neurology Physician and practices in San Antonio, Texas. Credentials: M.D..
How much does Ann Bass, M.D. prescribe under Medicare Part D?
In 2023, Ann Bass, M.D. wrote 2,956 Medicare Part D claims totaling $5.2M in drug costs for 318 beneficiaries.
What is Ann Bass, M.D.'s Medicare quality score?
Ann Bass, M.D. has a CMS MIPS Final Score of 75.3/100 (Quality: 50.6). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ann Bass, M.D. located?
Ann Bass, M.D. is located at 1314 E SONTERRA BLVD, San Antonio, TX, 78258. Phone: (210) 490-0016.
What is Ann Bass, M.D.'s NPI number?
Ann Bass, M.D.'s National Provider Identifier (NPI) is 1104925171, issued on 09/22/2006.
Does Ann Bass, M.D. prescribe more brand-name or generic drugs?
Ann Bass, M.D.'s prescribing is 16% brand-name and 83% generic drugs by claim count, with $4.8M in brand drug costs.
Does Ann Bass, M.D. prescribe opioids?
Yes, Ann Bass, M.D. had 55 opioid claims in 2023 with an opioid prescribing rate of 1.9%.
How many Neurology Physician providers are there in the US?
There are 19,866 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does Ann Bass, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Ann Bass, M.D.'s most frequently prescribed drugs include Gabapentin, Duloxetine Hcl, Pregabalin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ann Bass, M.D. accept Medicare?
Ann Bass, M.D. appears in CMS Medicare data with 2,956 Part D claims and 318 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ann Bass, M.D.'s credentials?
Ann Bass, M.D.'s NPI is 1104925171 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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.