Ann Brewster Lockhart

  • Walnut Creek, CA
  • Family medicine physician
NPI1639219876PAC ID1456310234
Medicare services, 2024
17
Medicare patients, 2024
24
Part D claims, 2024
27
MIPS score, 2024
90
Hospital affiliations
1
Practice address
1450 Treat Blvd, Walnut Creek, CA 94597
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

John Muir Medical Center - Walnut C - Imaging - HOPD

Acute Care Hospital outpatient department · Walnut Creek, California

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Ann Brewster Lockhart is a family medicine physician in Walnut Creek, California

Ann Lockhart practices at John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California.

Ann Lockhart's NPI, 1639219876, was assigned on February 7, 2007. Ann Lockhart graduated from UC San Diego School of Medicine in 2001. Ann Lockhart holds California license A80812.

NPI and contact details
Medicare PAC ID
1456310234
NPI enumeration date
February 7, 2007
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Professional email
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Personal email
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Mobile number
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Sex
Female
Estimated age
51
Medical school graduation
2001

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

Ann Brewster Lockhart practices at John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California

Ann Lockhart's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD, at 1450 Treat Blvd, Walnut Creek, CA 94597.

  • John Muir Medical Center - Walnut C - Imaging - HOPD
    1450 Treat Blvd, Walnut Creek, CA 94597

Source: Dmand AI Affiliation Data

Ann Brewster Lockhart is affiliated with 2 sites of care and 2 medical groups

Ann Lockhart's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California. Ann Lockhart is also affiliated with Contra Costa Regional Medical Center. The medical group on file is John Muir Medical Group. Dmand AI also links Ann Lockhart to 1 more medical group, named with a free account. Ann Lockhart's employer is on file too: a hospital.

See all 4 affiliations for Ann Lockhart

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Ann Brewster Lockhart's practice

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

EHR by site
SiteEHR vendor and product
John Muir Medical Center - Walnut C - Imaging - HOPDAvailable with a free account
+1 more site and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Ann Brewster Lockhart is one of 15,680 family medicine physicians in California

Family medicine is Ann Lockhart's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Ann Lockhart is board certified in family medicine by the American Board of Family Medicine. Ann Lockhart is licensed in California.

Specialties and state licenses

  • Family medicine, CaliforniaPrimaryLicense A80812 · 2002 to 2026 · taxonomy 207Q00000X

Clinical focus

Dmand AI lists chronic hypertension, lower back pain and menopause among the conditions Ann Lockhart treats.

Family medicine physicians near Ann Lockhart

Counts of family medicine physicians 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

Ann Brewster Lockhart billed Medicare for 17 services in 2024

CMS data shows 17 Medicare services from Ann Lockhart across 1 procedure code in 2024, all of them office visits, for 24 Medicare patients. Medicare paid $1,052 for them. Every service was in an office.

Medicare services, 202417
Medicare patients24
Paid by Medicare$1,052
Procedure codes1

Ann Lockhart's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 182024: 176%

Ann Lockhart compared with the California median for family medicine physicians, 2024

  • Ann Lockhart
  • California median
Medicare services
17vs 24693% below
Medicare patients
24vs 11880% below

Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.

Ann Lockhart'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.

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

Ann Brewster Lockhart treated 24 Medicare patients in 2024, average age 75

CMS counts 24 Medicare patients who saw Ann Lockhart in 2024. 75% of them have high cholesterol, and 58% have high blood pressure. 46% are also on Medicaid. Their average risk score is 0.93, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Ann Lockhart's median patient age at 38, with 80% women.

Medicare patients, 202424
Average age75
Average risk score0.93
Also on Medicaid46%

Chronic conditions among Ann Lockhart's Medicare patients, 2024

  1. High cholesterol75%
  2. High blood pressure58%

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

Ann Lockhart's patients across all payers

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

Patient panel by age, all payers

Median age 38

Patient panel by sex, all payers

  • Women80%
  • Men19%

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

Ann Brewster Lockhart wrote 27 Medicare Part D claims in 2024

In 2024, Ann Lockhart wrote 27 Medicare Part D claims for 13 patients. 89% of them were for generic drugs.

Part D claims, 202427
Part D patients13

Ann Lockhart's Part D claims by kind of drug, 2024

  • Generic24 claims89%
  • Brand-name and other3 claims11%

Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data

Ann Brewster Lockhart scored 90 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Ann Lockhart for performance year 2024, reported as part of a group. Ann Lockhart accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Ann Lockhart as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Ann Lockhart's MIPS scores, performance year 2024

  • 90of 100Final score
  • 89.5of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 74of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

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

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Ann Brewster Lockhart graduated from UC San Diego School of Medicine

Ann Lockhart graduated from UC San Diego School of Medicine in 2001.

  1. Medical schoolUC San Diego School of Medicine
  2. Board certified in family medicineAmerican Board of Family Medicine

Source: Dmand AI Professional Profile Data

Ann Brewster Lockhart accepts plans from 12 insurance carriers

Ann Lockhart is in network with 12 carriers, including Aetna, Elevance and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • United Healthcare
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Blue Cross Blue Shield of Michigan
  • Regence Health Plans
  • Alliant Health Plans
  • +4 more carriersWith a free account

Plan types Ann Lockhart accepts, by number of carriers

  1. Medicare8
  2. PPO8
  3. HMO6
  4. EPO3
  5. POS3

Source: Dmand AI Insurance Network Data

Sources for Ann Brewster Lockhart'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 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 (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 Ann Brewster Lockhart

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

What is Ann Brewster Lockhart's NPI number?

Ann Brewster Lockhart's NPI number is 1639219876. It was assigned on February 7, 2007, and it is active in the NPI Registry.

What does Ann Brewster Lockhart specialize in?

Ann Brewster Lockhart is a family medicine physician in Walnut Creek, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).

Where does Ann Brewster Lockhart practice?

Ann Lockhart practices at 1450 Treat Blvd, Walnut Creek, CA 94597. Ann Lockhart's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California. Dmand AI also links Ann Lockhart to 1 medical group.

What is Ann Brewster Lockhart's medical license number?

Ann Lockhart holds California license A80812.

Which hospitals is Ann Brewster Lockhart affiliated with?

Ann Lockhart is affiliated with Contra Costa Regional Medical Center.

What medical group is Ann Brewster Lockhart part of?

Ann Lockhart is linked to John Muir Medical Group. Dmand AI links Ann Lockhart to 1 more medical group.

Does Ann Brewster Lockhart accept Medicare?

Yes. CMS data shows Ann Lockhart billed Medicare for 17 services in 2024, and Ann Lockhart accepts Medicare assignment.

Does Ann Brewster Lockhart offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Ann Lockhart as offering telehealth services.

What is Ann Brewster Lockhart's MIPS score?

Ann Lockhart's MIPS final score for performance year 2024 is 90 out of 100, reported as part of a group.

How many Medicare patients does Ann Brewster Lockhart see?

CMS counts 24 Medicare patients who saw Ann Lockhart in 2024, with an average age of 75.

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Is Ann Brewster Lockhart board certified?

Yes. Ann Lockhart is board certified in family medicine by the American Board of Family Medicine.

What services does Ann Brewster Lockhart bill to Medicare?

In 2024, Ann Lockhart's most billed Medicare services were office visit, established patient (99213).

Where did Ann Brewster Lockhart go to medical school?

Ann Lockhart graduated from UC San Diego School of Medicine in 2001.

How long has Ann Brewster Lockhart been practicing?

Ann Lockhart graduated from medical school in 2001, 25 years ago.

What insurance does Ann Brewster Lockhart accept?

Ann Lockhart is in network with 12 carriers, including Aetna, Elevance and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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