Dr. Gary T. Lieb, MD
- Part D claims, 2024
- 9,589
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 2
- State licenses
- 3
- Practice address
- 2103 E Gonzales Rd, Oxnard, CA 93036
- Practice phone
- Call (805) 650-4700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southern California Permanente Medical Group
Oxnard, California
Find Dr. Lieb's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gary T. Lieb is an internist in Oxnard, California
Dr. Lieb practices at Southern California Permanente Medical Group in Oxnard, California.
Dr. Lieb's NPI, 1912935396, was assigned on June 28, 2006. Dr. Lieb graduated from David Geffen School of Medicine at UCLA in 1994. Dr. Lieb's California license number on file is C51356.
- NPI
- 1912935396NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901867639
- NPI enumeration date
- June 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 650-4700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary T. Lieb practices at Southern California Permanente Medical Group in Oxnard, California
Dr. Lieb's primary practice is Southern California Permanente Medical Group, at 2103 E Gonzales Rd, Oxnard, CA 93036 in Ventura County. The practice phone is (805) 650-4700.
- Southern California Permanente Medical Group2103 E Gonzales Rd, Oxnard, CA 93036 · Ventura CountyPhone(805) 650-4700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gary T. Lieb is affiliated with 2 sites of care and 1 medical group
Dr. Lieb's primary practice is Southern California Permanente Medical Group in Oxnard, California. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Lieb to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gary T. Lieb's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lieb practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southern California Permanente Medical Group | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary T. Lieb is one of 16,751 internists in California
Internal medicine is Dr. Lieb's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Lieb is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Lieb's licenses on file in 3 states: California, Connecticut and Ohio.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Connecticut license
- Ohio license
Clinical focus
Dmand AI lists chronic diabetes, chronic hypertension and muscle pain, fibromyalgia, and limb pain among the conditions Dr. Lieb treats.
Internists near Dr. Lieb
Counts of internists 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. Gary T. Lieb's patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Dr. Lieb's median patient age at 71, with 47% women.
Dr. Lieb'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
- Women47%
- Men53%
Source: Dmand AI Patient Panel Data
Dr. Gary T. Lieb wrote 9,589 Medicare Part D claims in 2024
In 2024, Dr. Lieb wrote 9,589 Medicare Part D claims for 952 patients. 92% of them were for generic drugs. CMS names the drug for 9,163 of them, across 127 drugs with 11 or more claims each, at $339,491 in total drug cost. In 2023, CMS named 9,194 claims across 117 drugs.
Dr. Lieb's Part D claims by kind of drug, 2024
- Generic8,788 claims92%
- Brand-name733 claims8%
- Other68 claims1%
Dr. Lieb'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.
Drug classes CMS tracks in Dr. Lieb's Part D claims, 2024
- Opioids4%391 of 9,589 claims
- Antibiotics1%136 of 9,589 claims
- Antipsychotics, patients 65 and over0%28 of 9,589 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9,1942024: 9,163No change
Drugs named by CMS: 127 in 2024, 117 in 2023.
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
How Dr. Gary T. Lieb takes part in Medicare
Dr. Lieb accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gary T. Lieb has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Lieb, most recently NCQA HSRP in 2014.
Awards and honors for Dr. Lieb
- 2014
- NCQA HSRP
- 2012
- NCQA DRP
- Undated
- Bridges to Excellence
Source: Dmand AI Professional Profile Data
Dr. Gary T. Lieb graduated from David Geffen School of Medicine at UCLA
Dr. Lieb graduated from David Geffen School of Medicine at UCLA in 1994.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Gary T. Lieb accepts plans from 2 insurance carriers
Dr. Lieb is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Lieb accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gary T. Lieb's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gary T. Lieb
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. Gary T. Lieb's NPI number?
Dr. Gary T. Lieb's NPI number is 1912935396. It was assigned on June 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary T. Lieb?
Dr. Gary T. Lieb is an internist in Oxnard, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gary T. Lieb practice?
Dr. Lieb practices at 2103 E Gonzales Rd, Oxnard, CA 93036. Dr. Lieb's primary practice is Southern California Permanente Medical Group in Oxnard, California. Dmand AI also links Dr. Lieb to 1 group practice or clinic.
What is Dr. Gary T. Lieb's office phone number?
The practice phone on file for Dr. Lieb is (805) 650-4700.
What is Dr. Gary T. Lieb's medical license number?
Dr. Lieb's California license number on file is C51356, one of the licenses on file in 3 states.
Which states has Dr. Gary T. Lieb been licensed in?
Dmand AI has state licenses on file for Dr. Lieb in California (2003 to 2025), Connecticut (1997 to 2004) and Ohio (1996 to 1998).
What medical group is Dr. Gary T. Lieb part of?
Dr. Lieb is linked to Southern California Permanente Medical Group.
Does Dr. Gary T. Lieb accept Medicare?
Yes. CMS lists Dr. Lieb as accepting Medicare assignment.
Is Dr. Gary T. Lieb board certified?
Yes. Dr. Lieb is board certified in internal medicine by the American Board of Internal Medicine.
Where did Dr. Gary T. Lieb go to medical school?
Dr. Lieb graduated from David Geffen School of Medicine at UCLA in 1994.
Show 3 more questionsShow fewer questions
What drugs does Dr. Gary T. Lieb prescribe most?
In 2024 Medicare Part D data, Dr. Lieb's most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Losartan Potassium.
How long has Dr. Gary T. Lieb been practicing?
Dr. Lieb graduated from medical school in 1994, 32 years ago.
What insurance does Dr. Gary T. Lieb accept?
Dr. Lieb is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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