Dr. Allison Leigh Klein, MD
- Part D claims, 2024
- 226
- Hospital affiliations
- 1
- Industry payments
- $24
- Medical group
- 1
- Insurance carriers
- 1
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Klein'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. Allison Leigh Klein is a family medicine physician in Fontana, California
Dr. Klein practices at Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
Dr. Klein's NPI, 1265664452, was assigned on August 20, 2009. Dr. Klein graduated from Loma Linda University School Of Medicine in 2007. Dr. Klein holds California license A108521.
- NPI
- 1265664452NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214071521
- NPI enumeration date
- August 20, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Allison Leigh Klein practices at Fontana Medical Center in Fontana, California
Dr. Klein's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Source: Dmand AI Affiliation Data
Dr. Allison Leigh Klein is affiliated with 1 site of care and 1 medical group
Dr. Klein's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Allison Leigh Klein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Klein practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Allison Leigh Klein is one of 15,680 family medicine physicians in California
Family medicine is Dr. Klein's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Klein is board certified in family medicine by the American Board of Family Medicine. Dr. Klein is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Family medicine physicians near Dr. Klein
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
Dr. Allison Leigh Klein's patients have a median age of 37
Across all payers, Dmand AI patient panel data puts Dr. Klein's median patient age at 37, with 73% women.
Dr. Klein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 37
Patient panel by sex, all payers
- Women73%
- Men27%
Source: Dmand AI Patient Panel Data
Dr. Allison Leigh Klein wrote 226 Medicare Part D claims in 2024
In 2024, Dr. Klein wrote 226 Medicare Part D claims for 144 patients. 88% of them were for generic drugs. CMS names the drug for 37 of them, across 3 drugs with 11 or more claims each, at $716 in total drug cost. In 2022, CMS named 12 claims across 1 drug.
Dr. Klein's Part D claims by kind of drug, 2024
- Generic200 claims88%
- Brand-name and other26 claims12%
Dr. Klein'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. Klein's Part D claims, 2024
- Opioids7%16 of 226 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, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 122024: 37208%
Drugs named by CMS: 3 in 2024, 1 in 2022.
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. Allison Leigh Klein takes part in Medicare
Dr. Klein 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. Allison Leigh Klein received $24 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Klein from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $24.
Companies that paid Dr. Klein 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. Allison Leigh Klein graduated from Loma Linda University School Of Medicine
Dr. Klein graduated from Loma Linda University School Of Medicine in 2007.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Allison Leigh Klein accepts plans from 1 insurance carrier
Dr. Klein is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Allison Leigh Klein'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 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) |
| Industry payments | Open Payments (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. Allison Leigh Klein
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. Allison Leigh Klein's NPI number?
Dr. Allison Leigh Klein's NPI number is 1265664452. It was assigned on August 20, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Allison Leigh Klein?
Dr. Allison Leigh Klein is a family medicine physician in Fontana, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Allison Leigh Klein practice?
Dr. Klein practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Klein's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
What is Dr. Allison Leigh Klein's office phone number?
The practice phone on file for Dr. Klein is (909) 427-5000.
What is Dr. Allison Leigh Klein's medical license number?
Dr. Klein holds California license A108521.
Which hospitals is Dr. Allison Leigh Klein affiliated with?
Dr. Klein practices at Fontana Medical Center in Fontana, California.
What medical group is Dr. Allison Leigh Klein part of?
Dr. Klein is linked to Southern California Permanente Medical Group.
Does Dr. Allison Leigh Klein accept Medicare?
Yes. CMS lists Dr. Klein as accepting Medicare assignment.
Is Dr. Allison Leigh Klein board certified?
Yes. Dr. Klein is board certified in family medicine by the American Board of Family Medicine.
Where did Dr. Allison Leigh Klein go to medical school?
Dr. Klein graduated from Loma Linda University School Of Medicine in 2007.
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What drugs does Dr. Allison Leigh Klein prescribe most?
In 2024 Medicare Part D data, Dr. Klein's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Hydrocodone-Acetaminophen.
Has Dr. Allison Leigh Klein received payments from drug or device companies?
CMS Open Payments shows $24 in general payments to Dr. Klein from 1 company from 2016 to 2016. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Allison Leigh Klein been practicing?
Dr. Klein graduated from medical school in 2007, 19 years ago.
What insurance does Dr. Allison Leigh Klein accept?
Dr. Klein is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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