Does E10.21 require prior authorization?

No, E10.21 does not require prior authorization (high confidence). Covered without prior authorization.

`E10.21`, Type 1 diabetes mellitus with diabetic nephropathy

ICD-10-CM

No Prior Auth Required

Covered without prior authorization (high confidence)

Claims must be submitted in accordance with CMS Pub 100-04 Medicare Claims Processing Manual, Chapter 32 Section 150 (Billing Requirements for Bariatric Surgery for Morbid Obesity), including use of the procedure and diagnosis codes listed there and in this local article.
Coverage for Type II diabetes mellitus complication diagnosis codes is based on the Internet Only Manual (IOM); include documentation and citations required by IOM when billing these diagnoses.
Bariatric surgery claims must reference the applicable national coverage determination (CMS Pub 100-03 Chapter 1 Part 2 Section 100.1) when submitting for payment.
Medical records must document the clinical findings supporting the billed foot care service and be available upon request.

Bariatric surgery for treatment of co-morbid conditions related to morbid obesity is payable when billed in accordance with CMS Pub 100-03 Medicare National Coverage Determinations Manual, Chapter 1 Part 2 Section 100.1.
Additional diagnoses listed in this local coverage article for Part A procedure codes and the article's listed CPT codes are covered for bariatric surgery to treat co-morbid conditions related to morbid obesity.
Foot care services are covered when the beneficiary has a listed systemic condition that justifies coverage per Medicare Benefit Policy Manual Pub.100-02, Ch.15, Section 290.4D.
For diagnosis codes designated by an asterisk, the patient must be under the active care of an M.D. or D.O., documented as having been seen for the complicating disease within the 6 months prior to service.
Claims asserting presumptive coverage must include a systemic-condition diagnosis from IOM 100-02 Ch.15 Section 290 Group 1 and a valid billing modifier Q7, Q8, or Q9.
Mycotic nail debridement is covered when mycotic nails are present in the context of a systemic disease with class findings and the appropriate Q modifier on the claim.

CGS-J15-L34246, Routine Foot Care and Debridement of Nails

J15

CGS-J15-L34399, Ophthalmology: Posterior Segment Imaging (Extended Ophthalmoscopy and Fundus Photography)

J15

CGS-J15-L38662, Implantable Continuous Glucose Monitors (I-CGM)

J15

CGS-J15-L34056, Urodynamics

J15

Ask Backwork about documentation requirements, denial risks, or coverage in your state.