Dr. Donald J. Gjesdal, MD
- Medicare services, 2017
- 6,400
- Part D claims, 2018
- 30
- Industry payments
- $207
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 1710 S Del Mar Ave, San Gabriel, CA 91776
- Practice phone
- Call (626) 280-6660
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Add Smile Health Services, Inc.
San Gabriel, California
Find Dr. Gjesdal's professional email, personal email and mobile number
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Dr. Donald J. Gjesdal is an allergist and immunologist in San Gabriel, California
Dr. Gjesdal practices at Add Smile Health Services, Inc. in San Gabriel, California.
Dr. Gjesdal's NPI, 1447254339, was assigned on June 8, 2005. Dr. Gjesdal graduated from David Geffen School of Medicine at UCLA in 1977. Dr. Gjesdal holds California license G37094.
- NPI
- 1447254339NPI Registry (opens in a new tab)
- NPI enumeration date
- June 8, 2005
- NPI status
- Active
- Practice phone
- (626) 280-6660
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Donald J. Gjesdal practices at Add Smile Health Services, Inc. in San Gabriel, California
Dr. Gjesdal's primary practice is Add Smile Health Services, Inc., at 1710 S Del Mar Ave, San Gabriel, CA 91776 in Los Angeles County. The practice phone is (626) 280-6660.
- Add Smile Health Services, Inc.1710 S Del Mar Ave, San Gabriel, CA 91776 · Los Angeles CountyPhone(626) 280-6660
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Donald J. Gjesdal is affiliated with 1 site of care
Dr. Gjesdal's primary practice is Add Smile Health Services, Inc. in San Gabriel, California.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Donald J. Gjesdal's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gjesdal practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Add Smile Health Services, Inc. | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Donald J. Gjesdal is one of 386 allergists and immunologists in California
Allergy and immunology is Dr. Gjesdal's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Gjesdal is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dr. Gjesdal is licensed in California.
Specialties and state licenses
- Allergy and immunology, CaliforniaPrimary
Allergists and immunologists near Dr. Gjesdal
Counts of allergists and immunologists 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. Donald J. Gjesdal billed Medicare for 6,400 services in 2017
CMS data shows 6,400 Medicare services from Dr. Gjesdal across 7 procedure codes in 2017. Medicare paid $66,286 for them. Every service was in an office.
Dr. Gjesdal's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Tests and treatments
- 2016: 8,9052017: 6,14231%
- Office and hospital visits
- 2016: 3732017: 25831%
Dr. Gjesdal compared with the California median for allergists and immunologists, 2017
- Dr. Gjesdal
- California median
- Medicare services
- 6,400vs 1,8403.5 times
- Part D claims
- 30vs 25988% below
Medians across 368 allergists and immunologists in California with Dmand AI profiles that report each measure.
Dr. Gjesdal's most billed Medicare procedure codes, 2017
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Gjesdal?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gjesdal and other allergists and immunologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Donald J. Gjesdal's patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Dr. Gjesdal's median patient age at 78, with 59% women.
Dr. Gjesdal's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women59%
- Men41%
Source: Dmand AI Patient Panel Data
Dr. Donald J. Gjesdal wrote 30 Medicare Part D claims in 2018
In 2018, Dr. Gjesdal wrote 30 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $1,027 in total drug cost. In 2017, CMS named 276 claims across 8 drugs.
Dr. Gjesdal's most prescribed drugs by claims, 2018
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, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 2762018: 3089%
Drugs named by CMS: 2 in 2018, 8 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Donald J. Gjesdal received $207 in industry payments in 2016
CMS Open Payments shows 2 general payments to Dr. Gjesdal from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Baxalta US Inc paid the most, $207.
Companies that paid Dr. Gjesdal the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Donald J. Gjesdal has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Gjesdal, most recently Top Doctors:LA Area in 2013.
Awards and honors for Dr. Gjesdal
- 2013
- Top Doctors:LA Area
- Top Doctors:San Diego Area
- 2012
- Top Doctors:Southern California
Source: Dmand AI Professional Profile Data
Dr. Donald J. Gjesdal graduated from David Geffen School of Medicine at UCLA
Dr. Gjesdal graduated from David Geffen School of Medicine at UCLA in 1977.
- Medical school
- Board certified in allergy & immunology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Donald J. Gjesdal'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 Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| Industry payments | Open Payments (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 |
| 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. Donald J. Gjesdal
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. Donald J. Gjesdal's NPI number?
Dr. Donald J. Gjesdal's NPI number is 1447254339. It was assigned on June 8, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Donald J. Gjesdal?
Dr. Donald J. Gjesdal is an allergist and immunologist in San Gabriel, California. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).
Where does Dr. Donald J. Gjesdal practice?
Dr. Gjesdal practices at 1710 S Del Mar Ave, San Gabriel, CA 91776. Dr. Gjesdal's primary practice is Add Smile Health Services, Inc. in San Gabriel, California.
What is Dr. Donald J. Gjesdal's office phone number?
The practice phone on file for Dr. Gjesdal is (626) 280-6660.
What is Dr. Donald J. Gjesdal's medical license number?
Dr. Gjesdal holds California license G37094.
Does Dr. Donald J. Gjesdal accept Medicare?
Yes. CMS data shows Dr. Gjesdal billed Medicare for 6,400 services in 2017.
Is Dr. Donald J. Gjesdal board certified?
Yes. Dr. Gjesdal is board certified in allergy & immunology by the American Board of Allergy and Immunology.
What services does Dr. Donald J. Gjesdal bill to Medicare?
In 2017, Dr. Gjesdal's most billed Medicare services were allergy test or treatment (95024), allergy test or treatment (95165) and allergy test or treatment (95117).
Where did Dr. Donald J. Gjesdal go to medical school?
Dr. Gjesdal graduated from David Geffen School of Medicine at UCLA in 1977.
What drugs does Dr. Donald J. Gjesdal prescribe most?
In 2018 Medicare Part D data, Dr. Gjesdal's most prescribed drugs by claims were Azelastine HCl and Fluticasone Propionate.
Has Dr. Donald J. Gjesdal received payments from drug or device companies?
CMS Open Payments shows $207 in general payments to Dr. Gjesdal from 1 company from 2016 to 2016. The largest total came from Baxalta US Inc.
How long has Dr. Donald J. Gjesdal been practicing?
Dr. Gjesdal graduated from medical school in 1977, 49 years ago.
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