Physician Profile
Unclaimed ProfileAbout KLEIN
Frederick A Klein, M.D. practises gastroenterology in Tucson, AZ. Frederick is a 1980 graduate of Northwestern University Feinberg Medical School.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Klein specialise in?
Dr. Klein is a gastroenterology in Tucson, AZ. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where is Dr. Klein located?
Dr. Klein is listed at 7566 N LA CHOLLA BLVD STE A, Tucson, AZ 85741. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Klein's phone number?
The number on file is (520) 742-4139. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Klein's NPI number?
Dr. Klein's National Provider Identifier is 1962487876. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Klein go to medical school?
Dr. Klein attended Northwestern University Feinberg Medical School, graduating in 1980. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Klein been practising?
Dr. Klein has 46 years experience. Calculated from a graduation year of 1980, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Klein do most often?
According to Medicare billing data, Dr. Klein performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope; provides treatments such as measurement of hydrogen in breath to test for stomach and bowel symptoms, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Klein confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Klein. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (520) 742-4139
- Email not available
Practice Locations
7566 N LA CHOLLA BLVD STE A
Tucson, AZ 85741
Procedures Most Often Billed to Medicare
785 services · 567 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
15 |
| Measurement of hydrogen in breath to test for stomach and bowel symptoms | Treatment | 91065 |
65 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
481 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
89 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
81 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
41 |
| New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more | Office visit | 99202 |
13 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterology specialists at this location 5
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterology specialists in Tucson 8
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at Northwestern University Feinberg Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 1980 at Northwestern University Feinberg Medical School 7
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in AZ who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.