Dr. Andrew Nimmich, MD

  • Walnut Creek, CA
  • Vascular surgeon
NPI1396238945PAC ID6103294764
Medicare services, 2024
12,874
Medicare patients, 2024
111
Part D claims, 2024
246
Publications
1
Hospital affiliations
1
Practice address
2637 Shadelands Drive, Walnut Creek, CA 94598
Practice phone
Call (925) 329-3710
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

BASS Imaging Center - Walnut Creek

Mammography / Breast Imaging Center · Walnut Creek, California

See all 3 affiliations

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Dr. Andrew Nimmich is a vascular surgeon in Walnut Creek, California

Dr. Nimmich practices at BASS Imaging Center - Walnut Creek in Walnut Creek, California.

Dr. Nimmich's NPI, 1396238945, was assigned on June 8, 2018. Dr. Nimmich graduated from Boston University School Of Medicine in 2018. Dr. Nimmich holds California license A198961.

NPI and contact details
Medicare PAC ID
6103294764
NPI enumeration date
June 8, 2018
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(925) 329-3710
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
34
Medical school graduation
2018

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Andrew Nimmich practices at BASS Imaging Center - Walnut Creek in Walnut Creek, California

Dr. Nimmich's primary practice is BASS Imaging Center - Walnut Creek, at 2637 Shadelands Drive, Walnut Creek, CA 94598. The practice phone is (925) 329-3710.

  • BASS Imaging Center - Walnut Creek
    2637 Shadelands Drive, Walnut Creek, CA 94598Phone(925) 329-3710

Source: Dmand AI Affiliation Data

Dr. Andrew Nimmich is affiliated with 2 sites of care and 1 medical group

Dr. Nimmich's primary practice is BASS Imaging Center - Walnut Creek in Walnut Creek, California. Dr. Nimmich is also affiliated with Providence Queen of the Valley Medical Center. The medical group on file is BASS Medical Group. Dr. Nimmich's employer is on file too: a breast imaging center.

See all 3 affiliations for Dr. Nimmich

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Andrew Nimmich's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nimmich practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
BASS Imaging Center - Walnut CreekAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Andrew Nimmich is one of 532 vascular surgeons in California

Vascular surgery is Dr. Nimmich's primary specialty in the NPI Registry, under taxonomy code 2086S0129X. Dmand AI has Dr. Nimmich's licenses on file in 2 states: California and Texas.

Specialties and state licenses

  • Vascular surgery, CaliforniaPrimaryLicense A198961 · 2024 to 2026 · taxonomy 2086S0129X
  • Texas licenseLicense U0818 · 2022 to 2024

Clinical focus

Dmand AI lists chronic skin ulcer and leg revascularization among the conditions Dr. Nimmich treats.

Vascular surgeons near Dr. Nimmich

Counts of vascular surgeons with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Andrew Nimmich billed Medicare for 12,874 services in 2024

CMS data shows 12,874 Medicare services from Dr. Nimmich across 12 procedure codes in 2024, for 111 Medicare patients. Medicare paid $679,861 for them. Every service was in an office.

Medicare services, 202412,874
Medicare patients111
Paid by Medicare$679,861
Procedure codes12

Dr. Nimmich's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Other services
2023: 10,8162024: 12,38214%
Surgery
2023: 1622024: 25054%
Imaging
2023: 1482024: 23055%
Office and hospital visits
2023: 02024: 12

Dr. Nimmich compared with the California median for vascular surgeons, 2024

  • Dr. Nimmich
  • California median
Medicare services
12,874vs 60921.1 times
Medicare patients
111vs 27259% below
Part D claims
225vs 554.1 times

Medians across 499 vascular surgeons in California with Dmand AI profiles that report each measure.

Dr. Nimmich's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Nimmich

Need commercial claims for Dr. Nimmich?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nimmich and other vascular surgeons in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Andrew Nimmich treated 111 Medicare patients in 2024, average age 76

CMS counts 111 Medicare patients who saw Dr. Nimmich in 2024. The largest group is 75 to 84, with 40 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 14% are also on Medicaid. Their average risk score is 3.21, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Nimmich's median patient age at 71, with 41% women.

Medicare patients, 2024111
Average age76
Average risk score3.21
Also on Medicaid14%

Dr. Nimmich's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Nimmich's Medicare patients by sex, 2024

  • Women4641%
  • Men6559%

Chronic conditions among Dr. Nimmich's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Diabetes71%
  4. Arthritis62%
  5. Ischemic heart disease55%
  6. Chronic kidney disease51%
  7. Heart failure38%
  8. Mood disorders33%

Share of Medicare patients with each condition. A patient can have several.

Dr. Nimmich's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women41%
  • Men59%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Andrew Nimmich wrote 246 Medicare Part D claims in 2024

In 2024, Dr. Nimmich wrote 246 Medicare Part D claims for 132 patients. 80% of them were for generic drugs. CMS names the drug for 225 of them, across 2 drugs with 11 or more claims each, at $36,123 in total drug cost. In 2023, CMS named 111 claims across 3 drugs.

Part D claims, 2024246
Drugs named by CMS2
Total drug cost$36,123
Part D patients132

Dr. Nimmich's Part D claims by kind of drug, 2024

  • Generic197 claims80%
  • Brand-name and other49 claims20%

Dr. Nimmich's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1112024: 225103%

Drugs named by CMS: 2 in 2024, 3 in 2023.

See all prescribing by Dr. Nimmich

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Andrew Nimmich ranks in the 79th percentile for leg revascularization (restoring blood flow) in Medicare

Dr. Nimmich accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nimmich as offering telehealth. CMS counts 19 procedures of leg revascularization (restoring blood flow) by Dr. Nimmich, more than 79% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Where Dr. Nimmich ranks in Medicare procedure volume

Leg revascularization (restoring blood flow)
79th percentile19 procedures
Varicose vein removal
48th percentile13 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Dr. Andrew Nimmich has 1 publication on record

Dmand AI links 1 paper to Dr. Nimmich in 2019. Dr. Nimmich's most frequent co-authors are Alik Farber, MD, Scott Anthony Hardouin, MD and Douglas W. Jones, MD.

Papers1

Dr. Nimmich's most frequent co-authors

Recent publications by Dr. Nimmich

See all 1 publications and co-authors

See who Dr. Nimmich researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nimmich works with, so you can find a warm path to the right vascular surgeons.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Andrew Nimmich received $7,654 in industry payments from 2018 to 2025

CMS Open Payments shows 121 general payments to Dr. Nimmich from 27 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 73% of the total. Penumbra, Inc. paid the most, $1,384.

General payments to Dr. Nimmich by program year, 2018 to 2025

General payments to Dr. Nimmich by kind, 2018 to 2025

$7.7Kin total
  • Food and beverage$5,61873%
  • Travel and lodging$1,17715%
  • Education$85911%

Companies that paid Dr. Nimmich the most, 2018 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Nimmich

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Andrew Nimmich graduated from Boston University School Of Medicine

Dr. Nimmich graduated from Boston University School Of Medicine in 2018.

  1. Medical schoolBoston University School Of Medicine

Source: Dmand AI Professional Profile Data

Dr. Andrew Nimmich accepts plans from 19 insurance carriers

Dr. Nimmich is in network with 19 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • Cigna
  • Elevance
  • HCSC
  • Alliant Health Plans
  • Blue Cross Blue Shield of Massachusetts
  • +11 more carriersWith a free account

Plan types Dr. Nimmich accepts, by number of carriers

  1. PPO12
  2. HMO11
  3. Medicare8
  4. POS5
  5. EPO2

Source: Dmand AI Insurance Network Data

Sources for Dr. Andrew Nimmich's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Andrew Nimmich

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Andrew Nimmich's NPI number?

Dr. Andrew Nimmich's NPI number is 1396238945. It was assigned on June 8, 2018, and it is active in the NPI Registry.

What kind of doctor is Dr. Andrew Nimmich?

Dr. Andrew Nimmich is a vascular surgeon in Walnut Creek, California. The primary specialty in the NPI Registry is Vascular Surgery Physician (taxonomy code 2086S0129X).

Where does Dr. Andrew Nimmich practice?

Dr. Nimmich practices at 2637 Shadelands Drive, Walnut Creek, CA 94598. Dr. Nimmich's primary practice is BASS Imaging Center - Walnut Creek in Walnut Creek, California.

What is Dr. Andrew Nimmich's office phone number?

The practice phone on file for Dr. Nimmich is (925) 329-3710.

What is Dr. Andrew Nimmich's medical license number?

Dr. Nimmich holds California license A198961, one of the licenses on file in 2 states.

Which states has Dr. Andrew Nimmich been licensed in?

Dmand AI has state licenses on file for Dr. Nimmich in California (2024 to 2026) and Texas (2022 to 2024).

Which hospitals is Dr. Andrew Nimmich affiliated with?

Dr. Nimmich is affiliated with Providence Queen of the Valley Medical Center.

What medical group is Dr. Andrew Nimmich part of?

Dr. Nimmich is linked to BASS Medical Group.

Does Dr. Andrew Nimmich accept Medicare?

Yes. CMS data shows Dr. Nimmich billed Medicare for 12,874 services in 2024, and Dr. Nimmich accepts Medicare assignment.

Does Dr. Andrew Nimmich offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Nimmich as offering telehealth services.

Show 9 more questionsShow fewer questions

How many Medicare patients does Dr. Andrew Nimmich see?

CMS counts 111 Medicare patients who saw Dr. Nimmich in 2024, with an average age of 76.

What services does Dr. Andrew Nimmich bill to Medicare?

In 2024, Dr. Nimmich's most billed Medicare services were medicare temporary code (Q9967), ultrasound (76937) and diagnostic imaging (75710).

Where did Dr. Andrew Nimmich go to medical school?

Dr. Nimmich graduated from Boston University School Of Medicine in 2018.

What drugs does Dr. Andrew Nimmich prescribe most?

In 2024 Medicare Part D data, Dr. Nimmich's most prescribed drugs by claims were Clopidogrel and Xarelto.

Has Dr. Andrew Nimmich received payments from drug or device companies?

CMS Open Payments shows $7,654 in general payments to Dr. Nimmich from 27 companies from 2018 to 2025. The largest total came from Penumbra, Inc.

How long has Dr. Andrew Nimmich been practicing?

Dr. Nimmich graduated from medical school in 2018, 8 years ago.

Does Dr. Andrew Nimmich do research?

Dmand AI links 1 publication to Dr. Nimmich.

Who does Dr. Andrew Nimmich publish with?

Dr. Nimmich's most frequent co-authors are Alik Farber, MD (1 shared paper), Scott Anthony Hardouin, MD (1 shared paper) and Douglas W. Jones, MD (1 shared paper).

What insurance does Dr. Andrew Nimmich accept?

Dr. Nimmich is in network with 19 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.

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