Dr. Gregg A. Letsinger, MD
- Medicare patients, 2024
- 19
- Part D claims, 2024
- 143
- Hospital affiliations
- 1
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 1100 Veterans Boulevard, Redwood City, CA 94063
- Practice phone
- Call (650) 299-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Letsinger'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. Gregg A. Letsinger is an emergency medicine physician in Redwood City, California
Dr. Letsinger practices at Redwood City Medical Center in Redwood City, California, part of Kaiser Permanente.
Dr. Letsinger's NPI, 1962580555, was assigned on November 1, 2006. Dr. Letsinger graduated from UC Davis School of Medicine in 1998. Dr. Letsinger holds California license A75022.
- NPI
- 1962580555NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355538984
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (650) 299-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregg A. Letsinger practices at Redwood City Medical Center in Redwood City, California
Dr. Letsinger's primary practice is Redwood City Medical Center, at 1100 Veterans Boulevard, Redwood City, CA 94063 in San Mateo County. The practice phone is (650) 299-2000.
- Redwood City Medical Center1100 Veterans Boulevard, Redwood City, CA 94063 · San Mateo CountyPhone(650) 299-2000
Source: Dmand AI Affiliation Data
Dr. Gregg A. Letsinger is affiliated with 2 sites of care and 1 medical group
Dr. Letsinger's primary practice is Redwood City Medical Center in Redwood City, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Letsinger to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregg A. Letsinger's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Letsinger practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Redwood City Medical Center | 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. Gregg A. Letsinger is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Letsinger's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Letsinger is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Letsinger's licenses on file in 2 states: California and Pennsylvania.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Pennsylvania license
Emergency medicine physicians near Dr. Letsinger
Counts of emergency 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
Dr. Gregg A. Letsinger treated 19 Medicare patients in 2024, average age 67
CMS counts 19 Medicare patients who saw Dr. Letsinger in 2024. The largest group is 85 and over, with 0 patients. 68% of them have high blood pressure, and 58% have high cholesterol. Their average risk score is 1.83, 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. Letsinger's median patient age at 46, with 52% women.
Dr. Letsinger's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Letsinger's Medicare patients, 2024
- High blood pressure68%
- High cholesterol58%
Share of Medicare patients with each condition. A patient can have several.
Dr. Letsinger's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregg A. Letsinger wrote 143 Medicare Part D claims in 2024
In 2024, Dr. Letsinger wrote 143 Medicare Part D claims for 111 patients. 92% of them were for generic drugs. CMS names the drug for 35 of them, across 2 drugs with 11 or more claims each, at $251 in total drug cost. In 2023, CMS named 16 claims across 1 drug.
Dr. Letsinger's Part D claims by kind of drug, 2024
- Generic132 claims92%
- Brand-name11 claims8%
Dr. Letsinger'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. Letsinger's Part D claims, 2024
- Opioids11%16 of 143 claims
- Antibiotics27%38 of 143 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: 162024: 35119%
Drugs named by CMS: 2 in 2024, 1 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. Gregg A. Letsinger takes part in Medicare
Dr. Letsinger 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. Gregg A. Letsinger graduated from UC Davis School of Medicine
Dr. Letsinger graduated from UC Davis School of Medicine in 1998.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Gregg A. Letsinger accepts plans from 2 insurance carriers
Dr. Letsinger 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. Letsinger accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregg A. Letsinger'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| 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. Gregg A. Letsinger
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. Gregg A. Letsinger's NPI number?
Dr. Gregg A. Letsinger's NPI number is 1962580555. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregg A. Letsinger?
Dr. Gregg A. Letsinger is an emergency medicine physician in Redwood City, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Gregg A. Letsinger practice?
Dr. Letsinger practices at 1100 Veterans Boulevard, Redwood City, CA 94063. Dr. Letsinger's primary practice is Redwood City Medical Center in Redwood City, California, part of Kaiser Permanente. Dmand AI also links Dr. Letsinger to 1 group practice or clinic.
What is Dr. Gregg A. Letsinger's office phone number?
The practice phone on file for Dr. Letsinger is (650) 299-2000.
What is Dr. Gregg A. Letsinger's medical license number?
Dr. Letsinger holds California license A75022, one of the licenses on file in 2 states.
Which states has Dr. Gregg A. Letsinger been licensed in?
Dmand AI has state licenses on file for Dr. Letsinger in California (2001 to 2026) and Pennsylvania (1999 to 2002).
Which hospitals is Dr. Gregg A. Letsinger affiliated with?
Dr. Letsinger practices at Redwood City Medical Center in Redwood City, California.
What medical group is Dr. Gregg A. Letsinger part of?
Dr. Letsinger is linked to The Permanente Medical Group, Inc.
Does Dr. Gregg A. Letsinger accept Medicare?
Yes. CMS lists Dr. Letsinger as accepting Medicare assignment.
How many Medicare patients does Dr. Gregg A. Letsinger see?
CMS counts 19 Medicare patients who saw Dr. Letsinger in 2024, with an average age of 67.
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Is Dr. Gregg A. Letsinger board certified?
Yes. Dr. Letsinger is board certified in emergency medicine by the American Board of Emergency Medicine.
Where did Dr. Gregg A. Letsinger go to medical school?
Dr. Letsinger graduated from UC Davis School of Medicine in 1998.
What drugs does Dr. Gregg A. Letsinger prescribe most?
In 2024 Medicare Part D data, Dr. Letsinger's most prescribed drugs by claims were Ondansetron ODT and Ibuprofen.
How long has Dr. Gregg A. Letsinger been practicing?
Dr. Letsinger graduated from medical school in 1998, 28 years ago.
What insurance does Dr. Gregg A. Letsinger accept?
Dr. Letsinger 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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